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

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 ((des studium) OR (dem studium)) la filosofia a litterature".
• Adding a wildcard symbol may retrieve word variants: test ((des studium) OR (dem studium)) la filosofia a litterature*.