Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveer » passiveeer, passiveneer, passivereer, passiverer, passiver, passiviert
passiveeer » passiveeeer, passiveneeer, passivereeer, passiverer, passiver, passiverwerb
massiv » massive
massiven » massiveen, massive, passiven, massively

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: (((passiv OR massiv) OR (passiveer OR passiveeer)) OR massiven).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or massiv) or (passiveer OR passiveeer)) or massiven)".
• Adding a wildcard symbol may retrieve word variants: (((passiv or massiv) or (passiveer OR passiveeer)) or massiven)*.