Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
passiveren » passiveneren, passivereren, passivieren, passieren, passiverer
passiveneren » passiveneneren, passivereneren, passivieren, passieren, passiverer
massiv » massive
massivere » massiveere, massiver, massive, massively
massigeren » massiger, massigen, massierer

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 ((passiveren OR passiveneren) OR (massigeren OR massivere)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv OR passive) or massiv) or ((passiveren or passiveneren) or (massigeren or massivere)))*".