Perhaps you should try some spelling variations:
passiv » passive, passiven
passivierende » passiveierende, passivenierende, passivierender, passivieren, aktivierende
passiver » passiveer, passivener, passive, passiven, passively
massiv » massive

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