Perhaps you should try some spelling variations:
la litterature » a literature
a litterature » a literature, _ litterature, et litterature
des studium » des studiums, das studium, dem studium
a filosofia » la filosofia, e filosofia, di filosofia
studium a » studium am, studium ad, 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 a filosofia ((a litterature) OR (la litterature))".
• Adding a wildcard symbol may retrieve word variants: test des studium a filosofia ((a litterature) OR (la litterature))*.