Improve search results for ids

[huwshimi]

A couple of issues from: canonical/jujucharms.com#308 (comment)

Firstly:
`If I search for "glance-simplestreams-sync", no results are shown.

If I search for "glance-simplestreams", then one result is shown, and it's for glance-simplestreams-sync.`

Possible solution is updating the query with spaces instead of hyphens.

Secondly:
However when I search for charm: cs:~boucherv29/keepalived-19, it says there are no results.

It's possible we can remove the cs: add some spaces etc. so that we return some results instead of nothing.