diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8bc7bfd..9385c94 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 #Änderungen von search_it
 
+##Version 6.1.3 (2016-12-27)
+  - Ähnlichkeitssuche bei konjunktiver Suche (AND) jetzt korrekt implementiert
+  - Hinweis dass der Suchindex erneuert werden muss, wenn Ähnlichkeitssuche eingeschaltet wird
+
 ##Version 6.1.2 (2016-11-21)
   - beim Löschen von Tabellen wird jetzt `TRUNCATE` benutzt, damit die autoincrementwerte zurückgesetzt werden @Flo
   - update.php löscht die alten Plugins "search_highlighter" und "reindex" aus den 5er Versionen 
diff --git a/install.sql b/install.sql
new file mode 100644
index 0000000..f75153b
--- /dev/null
+++ b/install.sql
@@ -0,0 +1,54 @@
+CREATE TABLE IF NOT EXISTS `%TABLE_PREFIX%search_it_index` (
+  `id` int(11) NOT NULL auto_increment,
+  `fid` varchar(255) NULL,
+  `catid` int(11) NULL,
+  `ftable` varchar(255) NULL,
+  `fcolumn` varchar(255) NULL,
+  `texttype` varchar(255) NOT NULL,
+  `clang` int(11) NULL,
+  `filename` varchar(255) NULL,
+  `fileext` varchar(255) NULL,
+  `plaintext` longtext NOT NULL default '',
+  `unchangedtext` longtext NOT NULL default '',
+  `teaser` longtext NOT NULL default '',
+  `values` longtext NOT NULL default '',
+  PRIMARY KEY (`id`),
+  INDEX (`fid`),
+  FULLTEXT (`plaintext`),
+  FULLTEXT (`unchangedtext`),
+  FULLTEXT (`plaintext`,`unchangedtext`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8;
+
+ALTER TABLE `%TABLE_PREFIX%search_it_index` CHANGE COLUMN fid fid varchar(255) NULL;
+/* ALTER TABLE `%TABLE_PREFIX%search_it_index` ADD COLUMN `values` text NOT NULL default ''; */
+
+/*DROP TRIGGER IF EXISTS minfid;
+CREATE TRIGGER minfid BEFORE INSERT ON `%TABLE_PREFIX%search_it_index`
+FOR EACH ROW
+  SET NEW.fid = CASE WHEN NEW.fid IS NULL THEN (SELECT IF(IFNULL(MIN(fid), 0) > 0, 0, IFNULL(MIN(fid), 0)) FROM `%TABLE_PREFIX%search_it_index`) - 1 ELSE NEW.fid END;*/
+
+CREATE TABLE IF NOT EXISTS `%TABLE_PREFIX%search_it_cache` (
+  `id` int(11) NOT NULL auto_increment,
+  `hash` char(32) NOT NULL,
+  `returnarray` longtext NULL,
+  PRIMARY KEY  (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+CREATE TABLE IF NOT EXISTS `%TABLE_PREFIX%search_it_cacheindex_ids` (
+  `id` int(11) NOT NULL auto_increment,
+  `index_id` int(11) NULL,
+  `cache_id` varchar(255) NULL,
+  PRIMARY KEY  (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+CREATE TABLE IF NOT EXISTS `%TABLE_PREFIX%search_it_keywords` (
+  `id` int(11) NOT NULL auto_increment,
+  `keyword` varchar(255) NOT NULL,
+  `soundex` varchar(255) NOT NULL,
+  `metaphone` varchar(255) NOT NULL,
+  `colognephone` varchar(255) NOT NULL,
+  `clang` int(11) NOT NULL DEFAULT -1,
+  `count` int(11) NOT NULL DEFAULT 1,
+  PRIMARY KEY  (`id`),
+  UNIQUE (`keyword`,`clang`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
diff --git a/lib/cronjob.php b/lib/cronjob.php
index 78f69ea..d404f72 100644
--- a/lib/cronjob.php
+++ b/lib/cronjob.php
@@ -1,7 +1,5 @@
 <?php
-/**
- * @package redaxo\search_it
- */
+
 class rex_cronjob_reindex extends rex_cronjob
 {
     public function execute()
diff --git a/lib/pdf2txt.php b/lib/pdf2txt.php
index 04025ad..1a0e0b5 100644
--- a/lib/pdf2txt.php
+++ b/lib/pdf2txt.php
@@ -7,7 +7,7 @@ class pdf2txt
     var $data;
 
     // constructor
-    function pdf2txt($_src = false, $_dest = false)
+    function __construct($_src = false, $_dest = false)
     {
         $this->setSource($_src);
         $this->setDestination($_dest);
diff --git a/lib/search_it.php b/lib/search_it.php
index d820f14..5bae060 100644
--- a/lib/search_it.php
+++ b/lib/search_it.php
@@ -878,8 +878,8 @@ public function parseSearchString($_searchString)
         preg_match_all('~(?:(\+*)"([^"]*)")|(?:(\+*)(\S+))~isu', $_searchString, $matches, PREG_SET_ORDER);
 
         $count = 0;
-        $replaceValues = array();
-        $sql = rex_sql::factory();
+        $searchWords = array();
+
         foreach ($matches as $match) {
             if (count($match) == 5) {
                 // words without double quotes (foo)
@@ -892,6 +892,7 @@ public function parseSearchString($_searchString)
             } else {
                 continue;
             }
+            if ( in_array($word,$searchWords) ) { continue; } else { $searchWords[] = $word; }
 
             $notBlacklisted = true;
             // blacklisted words are excluded
@@ -1012,6 +1013,7 @@ public function setSearchAllArticlesAnyway($_bool = false)
         $this->searchAllArticlesAnyway = $_bool;
         $this->hashMe .= $_bool;
     }
+
     /**
      * deprecated: use setSearchAllArticlesAnyway()
      *
@@ -1738,9 +1740,14 @@ public function deleteKeywords()
     function search($_search)
     {
         $startTime = microtime(true);
-        $this->searchString = trim(stripslashes($_search));
 
-        $keywordCount = $this->parseSearchString($this->searchString);
+        $return = array();
+        $return['errormessages'] = '';
+        $return['simwordsnewsearch'] = '';
+        $return['simwords'] = array();
+
+        $this->searchString = trim(stripslashes($_search));
+        $keywordCount = $this->parseSearchString($this->searchString); // setzt $this->searchArray
 
         if (empty($this->searchString) OR empty($this->searchArray)) {
             return array(
@@ -1767,17 +1774,14 @@ function search($_search)
 
             // EP registrieren
             rex_extension::registerPoint(new rex_extension_point('SEARCH_IT_SEARCH_EXECUTED', $this->cachedArray));
-            //var_dump($this->cachedArray['sql']);
+
             return $this->cachedArray;
         }
 
-        $return = array();
-        $return['errormessages'] = '';
-        $return['simwordsnewsearch'] = '';
-        $return['simwords'] = array();
+
         if ($this->similarwords) {
             $simWordsSQL = rex_sql::factory();
-            $simwords = array();
+            $simwordQuerys = array();
             foreach ($this->searchArray as $keyword) {
                 $sounds = array();
                 if ($this->similarwordsMode & SEARCH_IT_SIMILARWORDS_SOUNDEX) {
@@ -1791,39 +1795,47 @@ function search($_search)
                 if ($this->similarwordsMode & SEARCH_IT_SIMILARWORDS_COLOGNEPHONE) {
                     $sounds[] = "colognephone = '" . soundex_ger($keyword['search']) . "'";
                 }
-                $simwords[] = sprintf("
-                  SELECT
+                $simwordQuerys[] = sprintf("
+                  (SELECT
                     GROUP_CONCAT(DISTINCT keyword SEPARATOR ' ') as keyword,
                     %s AS typedin,
                     SUM(count) as count
                   FROM `%s`
                   WHERE 1
                     %s
-                    AND (%s)",
+                    AND (%s))",
                     $simWordsSQL->escape($keyword['search']),
                     $this->tablePrefix . 'search_it_keywords',
                     ($this->clang !== false) ? 'AND (clang = ' . intval($this->clang) . ' OR clang IS NULL)' : '',
                     implode(' OR ', $sounds)
                 );
             }
+            //echo '<br><pre>'; var_dump($simwordQuerys);echo '</pre>'; // Eine SQL-Abfrage pro Suchwort
 
             // simwords
             $simWordsSQL = rex_sql::factory();
             foreach ($simWordsSQL->getArray(sprintf("
-            %s
-            GROUP BY %s
-            ORDER BY SUM(count)",
-                    implode(' UNION ', $simwords),
-                    $this->similarwordsPermanent ? "''" : 'keyword, typedin'
-                )
-            ) as $simword) {
+                SELECT * FROM (%s) AS t
+                %s
+                ORDER BY count",
+                        implode(' UNION ', $simwordQuerys),
+                        $this->similarwordsPermanent ? '' : 'GROUP BY keyword, typedin'
+                    )
+                ) as $simword) {
+                //echo '<br><pre>'; var_dump($simword);echo '</pre>';
                 $return['simwords'][$simword['typedin']] = array(
                     'keyword' => $simword['keyword'],
                     'typedin' => $simword['typedin'],
                     'count' => $simword['count'],
                 );
             }
-
+            /*echo '<br><pre>' .sprintf("
+            SELECT * FROM (%s) AS t
+            %s
+            ORDER BY count",
+                implode(' UNION ', $simwordQuerys),
+                $this->similarwordsPermanent ? '' : 'GROUP BY keyword, typedin'
+            ).'</pre>'; die();*/
             $newsearch = array();
             foreach ($this->searchArray as $keyword) {
                 if (preg_match('~\s~isu', $keyword['search'])) {
@@ -1842,9 +1854,12 @@ function search($_search)
             $return['simwordsnewsearch'] = implode(' ', $newsearch);
         }
 
+        //print_r($this->searchArray);echo '<br><br>';
         if ($this->similarwordsPermanent) {
             $keywordCount = $this->parseSearchString($this->searchString . ' ' . $return['simwordsnewsearch']);
         }
+        //echo '<br><pre>'; print_r($return['simwords']); echo '</pre>';
+
 
         $searchColumns = array();
         switch ($this->textMode) {
@@ -1861,48 +1876,55 @@ function search($_search)
                 $searchColumns[] = 'plaintext';
         }
 
-        $sql = rex_sql::factory();
 
-        $Awhere = array();
+        $sql = rex_sql::factory();
+        $A2Where = array();
         $Amatch = array();
 
-        foreach ($this->searchArray as $keyword) {
-            // build MATCH-Array
-            $match = sprintf("(( MATCH (`%s`) AGAINST (%s)) * %d)", implode('`,`', $searchColumns), $sql->escape($keyword['search']), $keyword['weight']);
-
-            if ($this->searchHtmlEntities) {
-                $match .= ' + ' . sprintf("(( MATCH (`%s`) AGAINST (%s)) * %d)", implode('`,`', $searchColumns), $sql->escape(htmlentities($keyword['search'], ENT_COMPAT, 'UTF-8')), $keyword['weight']);
-            }
-
-            $Amatch[] = $match;
+        foreach ($this->searchArray as $searchword) {
+            $AWhere = array();
+            $similarkeywords = '';
+            if ( $this->similarwords && !isset($return['simwords'][$searchword['search']])) { continue; }
+            if ( isset($return['simwords'][$searchword['search']]['keyword']) ) { $similarkeywords = $return['simwords'][$searchword['search']]['keyword']; }
+            foreach ($this->searchArray as $keyword) {
+                if ( $keyword['search'] !== $searchword['search'] && !in_array( $keyword['search'], explode(' ', $similarkeywords)) ) { continue; }
+                // build MATCH-Array
+                $match = sprintf("(( MATCH (`%s`) AGAINST (%s)) * %d)", implode('`,`', $searchColumns), $sql->escape($keyword['search']), $keyword['weight']);
+                if ($this->searchHtmlEntities) {
+                    $match .= ' + ' . sprintf("(( MATCH (`%s`) AGAINST (%s)) * %d)", implode('`,`', $searchColumns), $sql->escape(htmlentities($keyword['search'], ENT_COMPAT, 'UTF-8')), $keyword['weight']);
+                }
+                $Amatch[] = $match;
 
-            // build WHERE-Array
-            if ($this->searchMode == 'match') {
-                $AWhere[] = $match;
-            } else {
-                $tmpWhere = array();
-                foreach ($searchColumns as $searchColumn) {
-                    $tmpWhere[] = sprintf("(`%s` LIKE '%%%s%%')", $searchColumn, str_replace(array('%', '_'), array('\%', '\_'), substr($sql->escape($keyword['search']), 1, -1)));
+                // build WHERE-Array
+                if ($this->searchMode == 'match') {
+                    $AWhere[] = $match;
+                } else {
+                    $tmpWhere = array();
+                    foreach ($searchColumns as $searchColumn) {
+                        $tmpWhere[] = sprintf("(`%s` LIKE '%%%s%%')", $searchColumn, str_replace(array('%', '_'), array('\%', '\_'), substr($sql->escape($keyword['search']), 1, -1)));
 
-                    if ($this->searchHtmlEntities) {
-                        $tmpWhere[] = sprintf("(`%s` LIKE '%%%s%%')", $searchColumn, str_replace(array('%', '_'), array('\%', '\_'), htmlentities($keyword['search'], ENT_COMPAT, 'UTF-8')));
+                        if ($this->searchHtmlEntities) {
+                            $tmpWhere[] = sprintf("(`%s` LIKE '%%%s%%')", $searchColumn, str_replace(array('%', '_'), array('\%', '\_'), htmlentities($keyword['search'], ENT_COMPAT, 'UTF-8')));
+                        }
                     }
+                    $AWhere[] = '(' . implode(' OR ', $tmpWhere) . ')';
                 }
-                $AWhere[] = '(' . implode(' OR ', $tmpWhere) . ')';
-            }
+                // echo '<br><pre>'; print_r($keyword); var_dump($AWhere);echo '</pre>';
 
-            /*if($this->logicalMode == ' AND ')
-            $Awhere[] = '+*'.$keyword['search'].'*';
-            else
-            $AWhere[] = '*'.$keyword['search'].'*';*/
+                /*if($this->logicalMode == ' AND ')
+                $Awhere[] = '+*'.$keyword['search'].'*';
+                else
+                $AWhere[] = '*'.$keyword['search'].'*';*/
+            }
+            $A2Where[] = '(' . implode(' OR ', $AWhere) . ')';
         }
-
         // build MATCH-String
         $match = '(' . implode(' + ', $Amatch) . ' + 1)';
 
         // build WHERE-String
-        $where = '(' . implode($this->logicalMode, $AWhere) . ')';
-        #$where = sprintf("( MATCH (%s) AGAINST ('%s' IN BOOLEAN MODE)) > 0",implode(',',$searchColumns),implode(' ',$Awhere));
+        $where = '(' . implode($this->logicalMode, $A2Where) . ')';
+        //$where = sprintf("( MATCH (%s) AGAINST ('%s' IN BOOLEAN MODE)) > 0",implode(',',$searchColumns),implode(' ',$Awhere));
+
 
         // language
         if ($this->clang !== false) {
@@ -2017,7 +2039,7 @@ function search($_search)
                 $this->limit[0], $this->limit[1]
             );
         }
-        //echo '<pre>'.$query.'</pre>';
+        //echo '<pre>'.$query.'</pre>';die();
         //echo '<pre>'.implode(",\n",$selectFields).'</pre>';
         try {
             $sqlResult = $sql->getArray($query);
diff --git a/package.yml b/package.yml
index 442c7ef..e123476 100644
--- a/package.yml
+++ b/package.yml
@@ -1,5 +1,5 @@
 package: search_it
-version: '6.1.1'
+version: '6.1.3'
 author: Robert Rupf/Norbert Micheel
 supportpage: https://github.com/tyrant88/search_it
 
diff --git a/pages/settings.mode.php b/pages/settings.mode.php
index f699495..42696e9 100644
--- a/pages/settings.mode.php
+++ b/pages/settings.mode.php
@@ -20,6 +20,7 @@
 
     $changed = array_keys(array_merge(array_diff_assoc($posted_config,$this->getConfig()), array_diff_assoc($this->getConfig(),$posted_config)));
     foreach ( array(
+                  'similarwordsmode',
                   'indexmode',
                   'indexoffline',
                   'ep_outputfilter',
diff --git a/plugins/documentation/package.yml b/plugins/documentation/package.yml
index 688ea93..8469e73 100644
--- a/plugins/documentation/package.yml
+++ b/plugins/documentation/package.yml
@@ -1,5 +1,5 @@
 package: search_it/documentation
-version: '6.1.1'
+version: '6.1.3'
 author: Alexander Walther/Norbert Micheel
 
 title: 'translate:search_it_documentation_title'
diff --git a/plugins/documentation/pages/index.php b/plugins/documentation/pages/index.php
index 108bcb4..8dda090 100644
--- a/plugins/documentation/pages/index.php
+++ b/plugins/documentation/pages/index.php
@@ -4,12 +4,11 @@
 $path = rex_path::plugin('search_it','documentation','docs/'.$langpath.'/');
 
 $files = [];
-foreach(scandir($path) as $i_file) {
-    if ($i_file != "." && $i_file != "..") {
-        $files[$i_file] = $i_file;
-    }
+foreach(rex_finder::factory($path)->filesOnly() as $file) {
+    $files[$file->getFileName()] = $file->getFileName();
 }
 
+
 if ( rex_request("search_it_document_image","string") != "" && isset($files[rex_request("search_it_document_image","string")]) ) {
     ob_end_clean();
     $content = rex_file::get($path.basename(rex_request("search_it_document_image","string")));
diff --git a/plugins/plaintext/package.yml b/plugins/plaintext/package.yml
index 0b4f584..eb26d2e 100644
--- a/plugins/plaintext/package.yml
+++ b/plugins/plaintext/package.yml
@@ -1,5 +1,5 @@
 package: search_it/plaintext
-version: '6.1.1'
+version: '6.1.3'
 author: Robert Rupf/Norbert Micheel
 
 title: 'translate:search_it_plaintext_title'
diff --git a/plugins/stats/package.yml b/plugins/stats/package.yml
index 345d234..021305f 100644
--- a/plugins/stats/package.yml
+++ b/plugins/stats/package.yml
@@ -1,5 +1,5 @@
 package: search_it/stats
-version: '6.1.1'
+version: '6.1.3'
 author: Robert Rupf/Norbert Micheel
 
 title: 'translate:search_it_stats_plugin_title'