Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passiverer, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passagieren
massiv » massive
massivere » massiveere, massiver, massive, massively
passieren » passiert, passiven
massierer » kassierer, kassierers, massferrer

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