Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passieren, passiverer, passiven
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiv » massive
massivere » massiveere, massiver, massive, massively
massigeren » massiger, massierer, massigsten
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 ((passiveren OR passivieren) OR ((massigeren OR massigen) OR massivere))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or ((passiveren or passivieren) or ((massigeren OR massigen) or massivere)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((passiveren or passivieren) or ((massigeren OR massigen) or massivere)))*.