Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passivieren, passiverer, passiven
massiv » massive
massiveeren » massiveeeren, massivere, passivieren, massigeren
passieren » passiert, passiven
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 passieren) OR (massigen OR massiveeren))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((passiveren or passieren) or (massigen or massiveeren)))*.