Perhaps you should try some spelling variations:
para literatura » pela literatura, pena literatura, armas literatura
die filosofia » di filosofia, de filosofia, da filosofia
der studium » oder studium, dem studium, dein studium
des studium » des studiums, das studium, dem studium
e filosofia » la filosofia

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: text ((der studium) OR (des studium)) ((die filosofia) OR (e filosofia)) para literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "text ((der studium) OR (des studium)) ((die filosofia) or (e filosofia)) para literatura".
• Adding a wildcard symbol may retrieve word variants: text ((der studium) OR (des studium)) ((die filosofia) or (e filosofia)) para literatura*.