Hmm, I'm not sure why it won't come up with results. The minimum length is 3 letters (specifically set because of TTB). I changed it to 2 and there's no change in results.
Eventually I'd like to remove the software search all together and use a Google search in place of it. I use Google advanced searches for just about everything these days.
By the way, I didn't intend for that to be condescending. The "Was that so hard?" is part of the link I used to make the search example. And I just like the "Let me Google that for you." thing... it makes me laugh.