Try DuckDuckGo instead, and see if it is marginal improvement.
I've been having trouble for weeks with all search engines. Perhaps because they all now rely on Google (Be More Evil) to do the bulk of the back end grunt work. You search for articles that you have read previously (and want to use as a reference) but now just can't seem to find again. Irritation, frustrating and worrying all in one.
Seems the new mantra should be, if you find something interesting that you want to refer back to later, bookmark it !