Perhaps you should try some spelling variations:
de litterature » la litterature, et litterature
di filosofia » la filosofia, e filosofia
filosofia de » filosofia del
der studium » oder studium, dem studium, des studium
studium di » studium die, studium i, studium ii

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 OR text) der studium di filosofia de litterature*".