Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passagieren
passieren » passiert, passiven
massiveren » massivement, massiven, massiver, massivern, massivelyn
massigeren » massiger, massigen, massierer
massivere » massiver, massive, massively

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 ((passivieren OR passieren) OR (massiveren OR (massigeren OR massivere)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passivieren or passieren) or (massiveren or (massigeren OR massivere))))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivieren or passieren) or (massiveren or (massigeren OR massivere))))*.