Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passagieren
passieren » passiert, passiven
massigen » massige, massigung, massie
massiger » massinger, massive, massie
massiveeren » massivere, massigeren, massivdecken

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 ((massigen OR massiger) OR massiveeren))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivieren or passieren) or ((massigen or massiger) or massiveeren)))*.