Lack of sorting?

Hi, I have a rMBP "13 and it's pretty new (a few weeks old), and I've filled up my hard drive way faster than I thought I would, so I thought I'd delete a few unnecessary items. I searched what items I thought I could do without, but instead of finding a list of useful items (movies, music, etc.) I found a BUNCH of webpages, as well as the movies and music sprinkled in. If you're confused, I attached a picture of what I'm talking about.

I have no idea why my computer is showing me these webpages. Hundreds and hundreds. Is there a setting I can choose so these don't show up when I'm looking for useful documents? Thanks.