Perhaps you should try some spelling variations:
a literatura » la literatura, a literature, y literatura
studien die » studien der
filosofia a » filosofia da, filosofia la, filosofia e
studie die » studie der
tests aus » tests auf, tests a, tests all

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: "tests aus ((studien die) OR (studie die)) filosofia a literatura".
• Adding a wildcard symbol may retrieve word variants: tests aus ((studien die) OR (studie die)) filosofia a literatura*.