Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, a literatura
das filosofia » da filosofia, la filosofia, di filosofia
y literatura » la literatura
studium das » studium des, studium der, studium die
text das » text des, text der, text die

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: ((text das) OR (text data)) studium das filosofia ((de literatura) OR (y literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((text das) OR (text data)) studium das filosofia ((de literatura) or (y literatura))".
• Adding a wildcard symbol may retrieve word variants: ((text das) OR (text data)) studium das filosofia ((de literatura) or (y literatura))*.