Perhaps you should try some spelling variations:
le litterature » la litterature, de litterature, le letterature
di filosofia » la filosofia, e filosofia
da filosofia » la filosofia, a filosofia, de filosofia
des studium » des studiums, das studium, dem studium
test des » test der, test test

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: "test des studium ((da filosofia) OR (di filosofia)) le litterature".
• Adding a wildcard symbol may retrieve word variants: test des studium ((da filosofia) OR (di filosofia)) le litterature*.