Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
peer studie » peer studies, peers studien, der studie
1 filosofia » e filosofia, a filosofia, _ filosofia
y filosofia » e filosofia, a filosofia, la filosofia
best peer » best peere, best peep, best paper

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 peer studie ((1 filosofia) OR (y filosofia)) de literatura".
• Adding a wildcard symbol may retrieve word variants: best peer studie ((1 filosofia) OR (y filosofia)) de literatura*.