Perhaps you should try some spelling variations:
y literatura » la literatura
studien der » studie der, studenten der
filosofia y » filosofia e, filosofia _, filosofia de
best peers » best peer, best peere, best papers
studien di » studien die, studien dd, studien bei

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 di) OR (studien der)) filosofia y literatura".
• Adding a wildcard symbol may retrieve word variants: best peers ((studien di) OR (studien der)) filosofia y literatura*.