Perhaps you should try some spelling variations:
la literatura » la litterature
de filosofia » e filosofia, di filosofia, la filosofia
dem studium » das studium, im studium, zum studium
d filosofia » di filosofia, da filosofia, e filosofia
test dem » test der, test des, test de

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 dem studium ((d filosofia) OR (de filosofia)) ((la literatura) OR (a literature)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "test dem studium ((d filosofia) OR (de filosofia)) ((la literatura) or (a literature))".
• Adding a wildcard symbol may retrieve word variants: test dem studium ((d filosofia) OR (de filosofia)) ((la literatura) or (a literature))*.