Perhaps you should try some spelling variations:
der filosofia » de filosofia, e filosofia, di filosofia
a literatura » la literatura, a literature, a literatur
y literatura » la literatura
west das » westen das, west ak, west a

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: west das studium der filosofia ((a literatura) OR (y literatura)).
• Adding a wildcard symbol may retrieve word variants: west das studium der filosofia ((a literatura) or (y literatura))*.