Perhaps you should try some spelling variations:
di literatura » de literatura, da literatura, ii literatura
der filosofia » de filosofia, e filosofia, di filosofia
filosofia di » filosofia de, filosofia da, filosofia del
testen das » testen des, westen das, testen der
testo das » test das, tests das, test dast

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) OR (testen das)) studium der filosofia di literatura".
• Adding a wildcard symbol may retrieve word variants: ((testo das) OR (testen das)) studium der filosofia di literatura*.