Perhaps you should try some spelling variations:
filosofica a » filosofica da, filosofica e, filosofica _
a literatura » la literatura, a literature, y literatura
studium ad » studium am, studium a, studium band
studium d » studium _, studium 1, studium 3
test das » test des, test day, west das

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: "test das ((studium d) OR (studium ad)) filosofica a literatura".
• Adding a wildcard symbol may retrieve word variants: test das ((studium d) OR (studium ad)) filosofica a literatura*.