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