Perhaps you should try some spelling variations:
e letterature » e letteratura, et litterature, de litterature
test duales » test doubles, test rules, test oracles
studium die » studium der, studium des
filosofia e » filosofia de, filosofia del
studium di » studium i, studium ii, studium d

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 duales ((studium di) OR (studium die)) filosofia e letterature".
• Adding a wildcard symbol may retrieve word variants: test duales ((studium di) OR (studium die)) filosofia e letterature*.