Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passieren, passagieren
passivierung » passiveierung, massivierung, passivenierung
massiven » massive, passiven, massiv
massively » massive
massivieren » massivere, massigeren, passivierende

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 ((massiven OR massively) OR ((passivieren OR (passivierung OR aktivierung)) OR massivieren))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((massiven or massively) or ((passivieren or (passivierung or aktivierung)) or massivieren)))*.