Perhaps you should try some spelling variations:
peers studien » peer studie, peer studies, plebs studien
de literatura » de litterature, la literatura, a literatura
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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "best peers studien 4 filosofia ((de literatura) OR (y literatura))".
• Adding a wildcard symbol may retrieve word variants: best peers studien 4 filosofia ((de literatura) OR (y literatura))*.