Is Search That Hard?

Hey I just made an account to post this.<p>I was wondering what Google does to make their searches seem so natural.<p>So, for example, I searched "mary j blige and friends" on Grooveshark.<p>And the first result was "Friends. Mary J Blige - Love and Life."<p>So they throw away the most common words ("and") and search artist, album, track for the highest frequency word counts (probably with a bit of stemming involved).<p>But I always wondered how Google makes this seem so natural?<p>Do they have 100,000+ if-else statements glued together?<p>Thanks