Perhaps you should try some spelling variations:
passiv » massiv, passiver
passiven » massiven, passiveren, passion
passiveren » massiveren, passivereren, passivieren, passieren, passiverer
passive » massive, passivere
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 ((passiven OR (passiveren OR massiveren)) OR (passive OR massive))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passiven or (passiveren or massiveren)) or (passive OR massive)))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiven or (passiveren or massiveren)) or (passive OR massive)))*.