Perhaps you should try some spelling variations:
passiv » massiv, passiver
passivene » massivene, passiverene, passiveand, passiverer, passively, passione
passive » massive, passivere
passiven » massiven, passiveren, passion
massiven » massive, massively, massiv
massiveren » massivere, massigeren, massivement

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 ((passive OR (passiven OR massiven)) OR massiveren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or passivene) or ((passive or (passiven OR massiven)) or massiveren))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or passivene) or ((passive or (passiven OR massiven)) or massiveren))*.