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

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