Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passivene » passiveene, massivene, passiverene, passiveand, passive, passively, passivee, passione
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passivieren, passiver
passiven » passiveen, massiven, passiveren, passive, passion
massiverer » massierer, massiver, massigeren, 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 passivene) OR (((passiverer OR massiverer) OR massivere) OR (passivene OR passiven))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or passivene) or (((passiverer OR massiverer) or massivere) or (passivene or passiven)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or passivene) or (((passiverer OR massiverer) or massivere) or (passivene or passiven)))*.