Perhaps you should try some spelling variations:
la litterature » a literature
filosofia la » filosofia da, filosofia le, filosofica da
test duales » test rules, test oracles, test dummies
studium di » studium die, studium ii, studium d
studium i » studium im, studium _, studium 1

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: ((test duales) OR (test doubles)) ((studium di) OR (studium i)) filosofia la litterature.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((test duales) or (test doubles)) ((studium di) OR (studium i)) filosofia la litterature".
• Adding a wildcard symbol may retrieve word variants: ((test duales) or (test doubles)) ((studium di) OR (studium i)) filosofia la litterature*.