Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
test oracle » test oracles, test oral, testing oracle
studien der » studie der, studenten der
studien die » studie die

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 oracle ((studien der) OR (studien die)) filosofia la literatura*.