Below are options for further constraining your search terms.
You can now use Lucene query syntax, as shown here:
Lucene query syntax
Fields you can search on include:
title, body, user, tag, postid, sectionid, reply (reply:1 = only replies), usenet (1 or 0)
(If you use Lucene commands, the other options here may be ignored.)
+title:"hello" Return all the items with the title "Hello"
+user:"hitchhiker" Return all the items by user 'hitchhiker'
-user:"hitchhiker" hello Return all items not written by user 'hitchhiker' with the word 'hello'
your~ Return items like 'yours' eg: ours, pours, tours