Ah, those were the days. Way back when in the Nineties, when Google was just taking off, it was possible to play a game we used to call "Let's Stump Google!" It was simple. You did a Google search on two words that were unrelated enough to render the result, "Sorry, your query returned no results. Search again?" (Or something.)
These days, now that Google's vast databases contain just about everything that's ever been written (including, presumably, the output of those hundred monkies and their hundred typewriters who are now 999,827 years away from coming up with Hamlet), I think it's safe to say there are no two words that will even get you just a single page of results.