Which quals are you interested in? There are a lot of different quals out there for different reasons. Some quals include you in HITs, while some are designed to exclude you. Some quals are private, while some qual tests have already run their course and the requester has recruited enough people. Etcetera, etcetera.
This is one of the options worth checking out: Qualification tests on QualifEye: QualifEye | TurkerView's MTurk Qualification & Qualifying Survey Cloud Watch