Perhaps you should try some spelling variations:
da literature » a literature, da literatura, la literature
filosofia da » filosofia de, filosofia del, filosofia e
di filosofia » la filosofia, e filosofia
des studium » des studiums, das studium, dein studium
dem studium » das studium, im studium, zum studium

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 ((des studium) OR (dem studium)) di filosofia da literature.
• Adding a wildcard symbol may retrieve word variants: test ((des studium) or (dem studium)) di filosofia da literature*.