Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
massiv » massive
massiveen » massiveeen, massivement, massivsten, massigeren
massiven » massiveen, massive, passiven, massively
massigen » massiger, massige, massigung

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 massiv) OR ((massiveen OR massiven) OR massigen)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((massiveen or massiven) or massigen))*.