Perhaps you should try some spelling variations:
des studium » des studiums, das studium, dein studium
dem studium » das studium, im studium, zum studium
filosofia a » filosofia da, filosofia la, filosofia _
filosofia e » filosofia de, filosofia del

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: test ((des studium) OR (dem studium)) 8 ((filosofia a) OR (filosofia e)) literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "test ((des studium) or (dem studium)) 8 ((filosofia a) OR (filosofia e)) literatura".
• Adding a wildcard symbol may retrieve word variants: test ((des studium) or (dem studium)) 8 ((filosofia a) OR (filosofia e)) literatura*.