Perhaps you should try some spelling variations:
filosofia a » filosofia da, filosofia la, filosofia _
filosofia e » filosofia de, filosofia del
die studie » eine studie
test die » test de, west die, test drive

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: "test die studie 2 ((filosofia a) OR (filosofia e)) literatura".
• Adding a wildcard symbol may retrieve word variants: test die studie 2 ((filosofia a) OR (filosofia e)) literatura*.