Perhaps you should try some spelling variations:
passiv » passive, passiver
passivieren » passiveieren, passiverieren, passivierende, passivierung, passieren
passiverer » passiveerer, passivererer, passiverwerb, passiver, passieren
passiven » passiveen, passiveren, passive, passion
massiv » massive

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 massiv) OR passivieren) OR (passiverer OR passiven))*.