Perhaps you should try some spelling variations:
passiv » passive, passiver
passiven » passiveen, passiveren, passive, passion
passiverer » passiveerer, passivererer, passiverwerb, passivieren, passiver
passiveeeren » passiveeeeren, passivereeeren, passivieren, passieren
massiv » massive
massiveren » massiveeren, massivere, massigeren, massivement

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 massiv) OR (massiveren OR (passiverer OR passiveeeren)))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiven or massiv) or (massiveren or (passiverer or passiveeeren))))*.