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