Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
passivierende » passivenierende, passiverierende, passivierender, passivieren, aktivierende
passivierungr » passivenierungr, passiverierungr, passivierung, passivierungs, passivierender
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 massiv) OR (passive OR passivierende)) OR passivierungr).
• Adding a wildcard symbol may retrieve word variants: (((passiv or massiv) or (passive or passivierende)) or passivierungr)*.