Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
best peep » best peer, best speed, best peere
studien a » studien am, studien _, studien 4
studien 3 » studien _, studien 4, studien 5

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: best peep ((studien a) OR (studien 3)) filosofia ((y literatura) OR (la literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "best peep ((studien a) or (studien 3)) filosofia ((y literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: best peep ((studien a) or (studien 3)) filosofia ((y literatura) OR (la literatura))*.