Also, the front page of the site needs to make this goal explicitly clear. Instead, the front page gives almost no indication of what this is for, and shows a lot of weird sounding empty result sets.
I've run this database through several fulltext search engines. The only one active and returning hits at present is Sphinx, since this is running on a pretty low-memory VPS. Ignore the other sections.
Essentially the difference between this search and, say, google, is that all of the words entered in the query must match a database record for that record to be returned as a hit. This is different from Google, which will return documents matching only some query terms. I think this returns quick feedback to the user that either they need to change query terms, or that topic is simply not covered in the database.
The result links are hard to read as well. I have no idea what the numbers mean... perhaps it should just say result? Whitespace between each line would help readability as well. The whole result page is wall of text.