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

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