Perhaps you should try some spelling variations:
passiver » passive, passiven, passively
passiverer » passiveer, passivener, passivelyer, passiverwerb, passivieren, passieren
passiveen » passiven, passivieren, passiveand
massiv » massive
massivere » massiveere, 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: ((((passiver OR passiveen) OR passiverer) OR massiv) OR massivere).
• Adding a wildcard symbol may retrieve word variants: ((((passiver or passiveen) or passiverer) or massiv) or massivere)*.