Perhaps you should try some spelling variations:
la literature » la litterature, a literature, la literatura
filosofia la » filosofia da, filosofia le, filosofica da
studium d » studium ad, 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 _)) filosofia la literature".
• Adding a wildcard symbol may retrieve word variants: test das ((studium d) OR (studium _)) filosofia la literature*.