Perhaps you should try some spelling variations:
en literatuur » de literatuur, tussen literatuur
filosofia en » filosofia e, filosofia del, filosofia con
test duales » test rules, test oracles, test dummies
d filosofia » di filosofia, de filosofia, da filosofia
studium d » studium ad, studium _, studium 1

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) OR (test doubles)) studium d filosofia en literatuur".
• Adding a wildcard symbol may retrieve word variants: ((test duales) OR (test doubles)) studium d filosofia en literatuur*.