Perhaps you should try some spelling variations:
filosofia da » filosofia del, filosofia e, filosofia della
filosofia de » filosofia del
testo das » tests das, testen das, test dast
test das » test des, test day, west das

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: ((testo das) OR (test das)) studium der ((filosofia da) OR (filosofia de)) literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((testo das) OR (test das)) studium der ((filosofia da) or (filosofia de)) literatura".
• Adding a wildcard symbol may retrieve word variants: ((testo das) OR (test das)) studium der ((filosofia da) or (filosofia de)) literatura*.