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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "bist das studie ((der filosofica) OR (e filosofica)) _ literatura".
• Adding a wildcard symbol may retrieve word variants: bist das studie ((der filosofica) OR (e filosofica)) _ literatura*.