Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivene » passiveene, massivene, passivenene, passiven, passiveand, passive
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
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 massivere)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passivene OR passiverer) or massivere))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivene OR passiverer) or massivere))*.