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
massiveren » massivere, massivement, massiver
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 ((massiveren OR passivieren) OR massigeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passive) or (passivene or passively)) or (massiven or ((massiveren OR passivieren) or massigeren)))".
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or (passivene or passively)) or (massiven or ((massiveren OR passivieren) or massigeren)))*.