Perhaps you should try some spelling variations:
passiven » passive, passion
massiv » massive
passiveren » passivieren, passieren, passiverer
passivierende » passivierender, passivieren, aktivierende
passiveierungr » passivierung, passivierungs

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: (((passiven OR massiv) OR (passiveren OR passivierende)) OR passiveierungr)*.