Perhaps you should try some spelling variations:
passiv » passive, massiv
passiven » passiveen, massiven, passive, passion
passivere » passiveere, massivere, passiverer, passivieren, passivee, passierte
passiver » passiveer, massiver, passive, passiert
passively » passiveely, massively, passive, passivity
massiven » massive, massively, massiv
massiver » 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 passiven) OR ((passivere OR massiven) OR ((passiver OR passively) OR massiver))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv OR passiven) or ((passivere or massiven) or ((passiver or passively) or massiver)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv OR passiven) or ((passivere or massiven) or ((passiver or passively) or massiver)))*.