If you have ever wondered how Google manages to consistently retrieve such relevant results, this month's Wired magazine lifts the lid. The article illustrates how important the words you enter into the search box actually are "a rock is a rock. It’s also a stone, and it could be a boulder. Spell it “rokc” and it’s still a rock. But put “little” in front of it and it’s the capital of Arkansas. Which is not an ark. Unless Noah is around". It pays to think about the search terms you use, especially with Google, where it is being used to find information on every topic imaginable.
Levy, Steven. How Google's algorithm rules the web. Wired 2010, March. Published online 22 Feb 2010. The article is available online at www.wired.com/magazine/2010/02/ff_google_algorithm/all/1.