Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passivieren, passieren, passiven
passiverer » passiveerer, passivenerer, passivererer, passiverwerb, passivieren, passiver
passiveieren » passiveeieren, passiveneieren, passivereieren, passivieren, passionierten, passivierende
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 passiverer) OR passiveieren) OR (massigen OR (massiveeren OR massivere)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or (((passiveren or passiverer) or passiveieren) or (massigen or (massiveeren OR massivere))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (((passiveren or passiverer) or passiveieren) or (massigen or (massiveeren OR massivere))))*.