Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveen » passiveeen, massiveen, passivereen, passiveand, passiverer, passive
passivieren » passiveieren, massivieren, passiverieren, passivierung, passieren, passivierender
passivierende » passiveierende, massivierende, passiverierende, passivierungde, passierende, passivierenderde, passivierender, aktivierende, passivierung
massiven » massive, massiv
massively » massive
passagieren » passagiere, passieren

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