Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver, passiverr, passivierenr
passivere » passiveere, massivere, passivenere, passiver, passivieren
passively » passiveely, massively, passivenely, passive, passivity
massiverwerb » passiverwerb, massivere, massierer
massiverer » massivere, massierer, massiver

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