Perhaps you should try some spelling variations:
die filosofica » di filosofia, de filosofia, vida filosofica
neue studien » neue medien, neue stufe
e filosofica » e filosofia, e filosofiche, a filosofia
die studien » die studie

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 ((neue studien) OR (die studien)) ((die filosofica) OR (e filosofica)) a literature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tests ((neue studien) or (die studien)) ((die filosofica) OR (e filosofica)) a literature".
• Adding a wildcard symbol may retrieve word variants: tests ((neue studien) or (die studien)) ((die filosofica) OR (e filosofica)) a literature*.