Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveeren » passiveeeren, massiveeren, passivereeren, passivieren, passieren, passivierende
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passivieren, passiver
massiven » massive, massively, massiv
massigeren » massiger, massigen, 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: (passiv OR ((passiven OR massiven) OR (massigeren OR (passiveeren OR passiverer)))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiven or massiven) or (massigeren or (passiveeren or passiverer))))*.