Hey Dona, I tried several common transistors and there were no results. In fact the only datasheets i could find seemed to be cribbed from the main distributors (digi-key, Mouser and alike).
For all up-to-date current parts i use the manufactuer websites. That way i know I'm getting the current document with all the latest revisions. For older stuff I usually use the superb datasheetarchive database http://www.datasheetarchive.com/.