Google Limit

Ok, Google is big and Google is beautiful. That's why we use it as our preferred search engine (don't we?!?). But Google doesn't know everything and just because Google can't find something, doesn't mean it's not out there. Here is a test project for the Reloade-community:Out of pure curiosity I'm trying to find the shortest reasonable search string where Google returns a    Your search - "xyz" - did not match any documents. I haven't written any of these search words down yet, but with little competition, I could be challenged. Ready, steady. go...