Perhaps you should try some spelling variations:
der filosofia » e filosofia, di filosofia, da filosofia
de filosofia » e filosofia, di filosofia, la filosofia
a literatura » la literatura, a literature, y literatura
testo das » test das, tests das, testen 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: "testo das studium ((der filosofia) OR (de filosofia)) a literatura".
• Adding a wildcard symbol may retrieve word variants: testo das studium ((der filosofia) OR (de filosofia)) a literatura*.