Perhaps you should try some spelling variations:
peers studien » peer studie, peer studies, plebs studien
a literatura » la literatura, a literature, a literatur
y literatura » la literatura
4 filosofia » e filosofia, a filosofia, y filosofia
best peers » best peer, best peere, best papers
studien 4 » studien _, studien 3, 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 peers studien 4 filosofia ((a literatura) OR (y literatura)).
• Adding a wildcard symbol may retrieve word variants: best peers studien 4 filosofia ((a literatura) or (y literatura))*.