Perhaps you should try some spelling variations:
passiven » passive, passion
massiven » massive, massively, massiv
massiveren » massigeren, massivement, passivieren, massivern, massiven, massivelyn
massivere » massiver, massive, massively

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