Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
massivieren » passivieren, passivierende, passivierung
massigeren » massiger, massigen, massierer
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: ((passiv OR passive) OR (massivieren OR (massigeren OR massivere)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv OR passive) or (massivieren or (massigeren or massivere)))*".