Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passively » passiveely, massively, passivenely, passive, passivity
massiverwerb » passiverwerb, massierer
massiverer » massierer, passiverer, massiver, massiverr, massivelyr
massivere » massiver, massive, massively

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 massiverwerb) OR massiverer)) OR (massivere OR passively)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passivieren or massiverwerb) or massiverer)) or (massivere or passively))*.