Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
passively » passiveely, massively, passivenely, passive, passivity
massiverwerb » passiverwerb, massierer
massiverr » massiver, massive, massively
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 ((passiverer OR massiverwerb) OR massiverr)) OR (massivere OR passively)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passiverer or massiverwerb) or massiverr)) or (massivere or passively))*.