Perhaps you should try some spelling variations:
del litterature » de litterature, des litteratures, et litterature
oder studium » dem studium, fur studium, das studium
da filosofia » la filosofia, di filosofia, a filosofia
der studium » dem studium, des studium, dein studium

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: "text ((der studium) OR (oder studium)) da filosofia del litterature*".