Perhaps you should try some spelling variations:
del literature » model literature, abel literature, fuel literature
oder studium » fur studium, das studium, ihr studium
di filosofia » la filosofia, e filosofia
dem studium » das studium, im studium, zum 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: "test ((oder studium) OR (dem studium)) di filosofia del literature".
• Adding a wildcard symbol may retrieve word variants: test ((oder studium) OR (dem studium)) di filosofia del literature*.