Perhaps you should try some spelling variations:
duales studium » das studium
de literatura » de litterature, la literatura, y literatura
di filosofia » la filosofia, e filosofia
de filosofia » e filosofia, la filosofia, a 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 ((di filosofia) OR (de filosofia)) de literatura*.