rummage around (somewhere) (for something)
to move things about haphazardly while looking for something somewhere. Alice rummaged around in the drawer for a candy bar she had been saving. After she rummaged around for the candy bar, she found it. She rummaged around in the old trunk.
rummage through something
to move things about haphazardly while searching through something. I rummaged through my top drawer, looking for any two socks that matched. Mary spent some time rummaging through the toolbox before she found what she was looking for.