Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, e literatura
die filosofia » di filosofia, de filosofia, e filosofia
da literatura » la literatura, a literatura, de literatura
studium die » studium der, studium des

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: (testo OR texto) das studium die filosofia ((del literatura) OR (da literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(testo or texto) das studium die filosofia ((del literatura) OR (da literatura))".
• Adding a wildcard symbol may retrieve word variants: (testo or texto) das studium die filosofia ((del literatura) OR (da literatura))*.