Perhaps you should try some spelling variations:
der filosofia » de filosofia, e filosofia, di filosofia
a literatura » la literatura, a literature, a literatur
y literatura » la literatura
test das » test day, west das, testen das
test des » test der, test test

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: ((test das) OR (test des)) studium der filosofia ((a literatura) OR (y literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((test das) OR (test des)) studium der filosofia ((a literatura) or (y literatura))".
• Adding a wildcard symbol may retrieve word variants: ((test das) OR (test des)) studium der filosofia ((a literatura) or (y literatura))*.