Perhaps you should try some spelling variations:
target studien » target studies, targets studies, target station
tests target » test target, tester target, test targets
de filologia » di filologia, e fisiologia
de filosofia » e filosofia, di filosofia, la filosofia
y literatura » la literatura

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: tests target studien ((de filologia) OR (de filosofia)) y literatura.
• Adding a wildcard symbol may retrieve word variants: tests target studien ((de filologia) or (de filosofia)) y literatura*.