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

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: "texten ((des studium) OR (dem studium)) e filosofia da literatura*".