Perhaps you should try some spelling variations:
na literatura » la literatura, a literatura, a literature
filosofia na » filosofia da, filosofia la, filosofia n
e filosofia » la filosofia
studium e » studium _, studium 1, studium 3
text das » text des, text data, text die

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: "((text das) OR (text der)) studium e filosofia na literatura".
• Adding a wildcard symbol may retrieve word variants: ((text das) OR (text der)) studium e filosofia na literatura*.