How difficult should it be?

Do you ever have moments when you know something exists but you just can't seem to find it? When, despite your best efforts on Google search you just can't seem to hit on the exact key words you need to pull it up? I got quite frustrated today trying to find sample advertisement that made claims based upon some sort of undisclosed statitiscal analysis. You know the ones that I mean...the 9 out of 10 dentists recommend, with better highway mileage than any other domestic car, more washings for your money....After over half an hour of searching I *finally* came across two that I thought would work out okay for my statistics unit. And I have to document them so that I don't completely lose them again in the future!