Perhaps you should try some spelling variations:
passiv » passive, massiv
passiver » passiveer, massiver, passive, passively, passiert
passiven » passiveen, massiven, passive, passion
passiverer » passiveerer, massiverer, passiveer, passivelyer, passierter, passiverwerb, passivieren, passieren
passiveeeren » passiveeeeren, massiveeeren, passivieren, passieren
massiven » massive, massively, massiv
massiveren » 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 passiver) OR ((passiven OR massiven) OR (massiveren OR (passiverer OR passiveeeren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv OR passiver) or ((passiven or massiven) or (massiveren or (passiverer or passiveeeren))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv OR passiver) or ((passiven or massiven) or (massiveren or (passiverer or passiveeeren))))*.