Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivene » passiveene, massivene, passivenene, passiven, passiveand, passive
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passieren, passiveer, passivener, passivelyer
passiver » passiveer, massiver, passivener, passive, passiven, passively
massivere » massiver, massive, massively
massiven » massive, passiven, massively

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 passivene) OR ((passiverer OR massivere) OR (passiver OR massiven))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or passivene) or ((passiverer or massivere) or (passiver or massiven)))*.