Perhaps you should try some spelling variations:
duales studium » das studium
ds filosofica » de filosofia, da filosofia, e filosofica
de literatura » de litterature, la literatura, y literatura
di filosofia » la filosofia, e filosofia
test duales » test doubles, test rules, test oracles

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 duales studium ((ds filosofica) OR (di filosofia)) de literatura.
• Adding a wildcard symbol may retrieve word variants: test duales studium ((ds filosofica) or (di filosofia)) de literatura*.