Ah yes. I knew this would come up. Let's see. If you count how many topics we have, it's about 10,000 Topics. Imagine having a search engine for that many threads for it to work all the time and not get backed up or glitching or even possibly messing up the site. Just ask a Moderator or check through a couple of pages.
Hire someone... this is a site just to talk Ricador. We are not trying to go super awesome. We don't need a Thread searcher that is very good until Daniel decides he wants to try to compete with very big Flash game sites.
This has been brought up many times before, and is currently being considered. We used to have one, but it was not working well with the system so we had to remove it. Hopefully we will be able to get one back up soon, and one that works better.