Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
passieren » passiert, passiven
massiveren » massigeren, massivement, passivieren, massivern, massivelyn, massivenn
massivere » massiver, massively, massiven

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