Perhaps you should try some spelling variations:
e letterature » e letteratura, et litterature, de litterature
studium das » studium des, studium der, studium die
filosofia e » filosofia de, filosofia del
test della » testa della, testi della, test delle
studium da » studium a, studium d, studium der

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 della ((studium da) OR (studium das)) filosofia e letterature".
• Adding a wildcard symbol may retrieve word variants: test della ((studium da) OR (studium das)) filosofia e letterature*.