Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
passively » passiveely, massively, passivenely, passive, passivity
passivener » passiveener, massivener, passivenener, passiven, passiver, passiverwerb
massivene » massiven, massivere, massive
passieren » passiert, passiven

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 massivene) OR ((passiverer OR passieren) OR (passively OR passivener))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massivene) or ((passiverer or passieren) or (passively or passivener)))*.