Perhaps you should try some spelling variations:
filosofia la » filosofia da, filosofia le, filosofica da
filosofia _ » filosofia e, filosofia y, filosofia de
aus studie » aus studien, fans studie, us studies
studie die » studie der
tests aus » tests auf, tests a, tests all

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 aus studie die ((filosofia _) OR (filosofia la)) literature*.