Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivereren » passiveereren, passivenereren, passiverereren, passivieren, passivierenden, passieren, passiverwerben, passivierenen, passiveren
passiverer » passiveerer, passivenerer, passivererer, passiverwerb, passivieren, passiver
passiveieren » passiveeieren, passiveneieren, passivereieren, passivieren, passionierten, passivierende
massiv » massive
massivere » massiveere, massiver, massive, massively
massigen » massiger, massigung, massie, massigern, massign
massige » massiger, massig

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 (((passivereren OR passiverer) OR passiveieren) OR ((massigen OR massige) OR massivere))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (((passivereren or passiverer) or passiveieren) or ((massigen or massige) or massivere)))*.