Perhaps you should try some spelling variations:
e filosofica » e filosofia, e filosofiche, a filosofia
a literatura » la literatura, a literature, a literatur
y literatura » la literatura
testen das » testen des, westen das, testen der
studium e » studium _, studium 1, studium 3
west » test

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((west _) OR (testen das)) studium e filosofica ((a literatura) OR (y literatura)).
• Adding a wildcard symbol may retrieve word variants: ((west _) or (testen das)) studium e filosofica ((a literatura) or (y literatura))*.