Your example search used nothing but common words, it couldn't help but to be close to everything.
Which words do you think it should ignore? I'd probably agree that things like the articles should be filtered out, but what else? Once you get past very simple words, you're on an extremely slippery slope.
To be clear. I'm neither defending nor apologizing for the Q&A search--my beef with the search on the forums is well known. It is likely, however, to be too early to tell whether it sucks or not as there's simply not enough threads to see how well it sorts gems from dross.