Perhaps you should try some spelling variations:
del literature » model literature, abel literature, fuel literature
das filosofia » da filosofia, la filosofia, a filosofia
di filosofia » la filosofia, e filosofia
westen das » testen das, westen der, westfalen das
west das » west ak, west a, west d.d

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) OR (westen das)) studium ((das filosofia) OR (di filosofia)) del literature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((west das) or (westen das)) studium ((das filosofia) OR (di filosofia)) del literature".
• Adding a wildcard symbol may retrieve word variants: ((west das) or (westen das)) studium ((das filosofia) OR (di filosofia)) del literature*.