Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiveere » passiveeere, massiveere, passivereere, passiver, massivere, passiverer
passiven » passiveen, massiven, passiveren, passive, passion
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
massiveren » massivere, massigeren, massivement

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 passiveere) OR ((passiven OR passivieren) OR massiveren)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or passiveere) or ((passiven or passivieren) or massiveren))*.