Perhaps you should try some spelling variations:
di literatura » de literatura, ii literatura, di letteratura
da literatura » la literatura, a literatura, de literatura
e filosofia » la filosofia
tests das » tests des, test das, tests data
studium e » studium _, studium 1, studium 3

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: "tests das studium e filosofia ((di literatura) OR (da literatura))".
• Adding a wildcard symbol may retrieve word variants: tests das studium e filosofia ((di literatura) OR (da literatura))*.