Perhaps you should try some spelling variations:
filosofia le » filosofia e, filosofia del, filosofia da
filosofia de » filosofia del
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)) da ((filosofia le) OR (filosofia de)) letterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "test ((des studium) OR (dem studium)) da ((filosofia le) or (filosofia de)) letterature".
• Adding a wildcard symbol may retrieve word variants: test ((des studium) OR (dem studium)) da ((filosofia le) or (filosofia de)) letterature*.