Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passivenierende » passiveenierende, massivenierende, passivenenierende, passivierende, passivierender, passivierenden
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 passivenierende) OR (massigeren OR massivere)))*.