It's called a GoogleBomb.
A bunch of people with popular websites post links from a phrase to a website. Google's algorithm assumes that they know what they're talking about and associates the phrase with the targeted site even if the phrase doesn't actually appear in the site's text. With an uncommon phrase, you don't even need a lot of bomber sites (the current estimate is under 30 bombers). Originally it was done as a joke, a guy encouraged his friends to link the phrase "talentless hack" with a colleague's website.
Michael Moore and Hillary show up because some rightwingers are trying (and failing) to retarget the bomb.