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

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 studium di filosofia ((de literatura) OR (y literatura))*.