Perhaps you should try some spelling variations:
der filosofica » de filosofia, e filosofia, di filosofia
e filosofica » e filosofia, e filosofiche, a filosofia
das studien » des studien, davis studien, das studieren
bist das » ist das, list das, geist das

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: bist das studien ((der filosofica) OR (e filosofica)) _ literatura.
• Adding a wildcard symbol may retrieve word variants: bist das studien ((der filosofica) or (e filosofica)) _ literatura*.