Perhaps you should try some spelling variations:
passiver » passive, passively, passiert
passiven » passive, passion
massiven » massive, massively, massiv
passivierende » passivierender, passivieren, aktivierende

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: ((passiver OR (passiven OR massiven)) OR passivierende)*.