Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
massivene » massiven, massive, massively
massivere » massiver, massive, massively
massiverer » massiverr, massiver, massivelyr, massierer, massigeren

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 ((massivene OR massivere) OR (massiverer OR passiverer)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((massivene or massivere) or (massiverer OR passiverer)))*".