Perhaps you should try some spelling variations:
passiv » massiv, passiver
passive » massive, passivere
passiverer » massiverer, passivererer, passiverwerb, passivieren, passiver
passiven » massiven, passiveren, passion
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 passive) OR passiverer) OR (passiven OR massiveren))*.