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

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: ((massiv OR (passiven OR passivierende)) OR passivierungr).
• Adding a wildcard symbol may retrieve word variants: ((massiv or (passiven or passivierende)) or passivierungr)*.