Perhaps you should try some spelling variations:
passiven » passive, passion
passivenely » passiveely, passionely, passively
passiveren » passivieren, passieren, passiverer
massivierung » passivierung, passivierungs, massierung
passiveere » passivieren, passiver, massivere

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 (passiveren OR massivierung)) OR (passivenely OR passiveere))*.