First of all, it’s doubtful that all those results relate to you.
Secondly: Removing your web presence is pretty much impossible.
As sinscriven said, the closest you’ll ever get is by deleting old accounts and profiles you don’t want on the web anymore. But that’ll be only a tiny piece of your online footprint if you’re a normal active internet user.
Just remember, ANYTHING you put on the web is subject to remain there forever, and you won’t always know how it’s being used or where else it’s going.
For example, many Fluther users probably don’t know that every question they ask gets automatically blasted out on Fluther’s Twitter page. So even though they allow you the option to refrain from posting your question on your social profiles, Fluther will still post it on theirs, regardless of your choice.