Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiver » passiveer, massiver, passivener, passive, passiven, passively
passiveener » passiveeener, massiveener, passiveneener, passiverer, passivierender, passiverwerb
massivere » massiver, massive, massiven
massively » 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 ((passivieren OR massivere) OR ((passiver OR passiveener) OR massively))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivieren or massivere) or ((passiver or passiveener) or massively)))*.