diff --git a/dislib/model_selection/_search.py b/dislib/model_selection/_search.py
index 00fb7cb2..9b55ed00 100644
--- a/dislib/model_selection/_search.py
+++ b/dislib/model_selection/_search.py
@@ -57,6 +57,10 @@ def fit(self, x, y=None, **fit_params):
 
     def train_candidates(self, x, y, **fit_params):
         """Run fit with all sets of parameters.
+        This method does not generate the scores. By not generating
+        the scores we avoid the syncrhonization of the GridSearch.
+        It is useful if several GridSearchs are used. To generate the
+        scores it will be needed to use score function.
 
         Parameters
         ----------
@@ -135,6 +139,7 @@ def evaluate_candidates(candidate_params):
 
     def score(self, x=None, y=None, **fit_params):
         """Compute score for the trained sets of parameters.
+        To compute the score a synchronization is needed.
 
         Parameters
         ----------