Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passivieren, passieren, passiverer
massiv » massive
massiveeren » massiveeeren, passivieren, massigeren, massivdecken
massivere » massiveere, massiver, massive, massively
massigen » massiger, massige, massigung

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 (passiveren OR (massigen OR (massiveeren OR massivere)))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (passiveren or (massigen or (massiveeren or massivere))))*.