Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivene » massivene, passivenene, passiverene, passiven, passiveand, passiverer
passively » massively, passivenely, passiverely, passivity, passiven
passivieren » massivieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiven » massive, passiven, massively
massigeren » massiger, massigen, massivere

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 (passivene OR passively)) OR (massiven OR (passivieren OR massigeren))).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or (passivene or passively)) or (massiven or (passivieren or massigeren)))*.