Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiverere » passiveerere, massiverere, passivererere, passiverer, passiverwerb, passivierende
passiven » passiveen, massiven, passiveren, passive, passion
passiveren » passiveeren, massiveren, passivereren, passivieren, passieren, passiverer
massiven » massive, massively, massiv

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 massiven) OR (passiverere OR (passiven OR passiveren)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiven) or (passiverere or (passiven OR passiveren)))*".