Perhaps you should try some spelling variations:
la literature » la litterature, a literature, la literatura
filosofia la » filosofia da, filosofia le, filosofica da
e filosofia » la filosofia
tests zum » tests zur
studium e » studium _, studium 1, studium 3
test zum » test zur, fest zum, nest zum

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 zum) OR (tests zum)) studium e filosofia la literature".
• Adding a wildcard symbol may retrieve word variants: ((test zum) OR (tests zum)) studium e filosofia la literature*.