Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
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 passiveeer) OR massiven).
• Adding a wildcard symbol may retrieve word variants: (((passiv or massiv) or passiveeer) or massiven)*.