Search help?

I'm not sure why, but a lot of my searches get me a blank screen. My one word user name searches always work fine, and my one word keyword searches generally work too. But some multiple keyword searches, like "GTS Radeon" (search was without quotes), nothing comes up. Also, earlier I was searching for "Dell Coupon" (again without quotes), and, nothing--I know a thread exists, and I found it manually, but it was weird that the search didn't do anything. Not zero results: my ie window just went blank. I'm not sure if I should wait longer, but I'm on a decently fast connection, and I've kept one or two of these search windows open for ~ two minutes with no results.

My search on dell coupon returned 37 hits in a few seconds
as did my search on dell AND coupon.

sounds like some excessive case sensitivity.