Perhaps you should try some spelling variations:
passiv » passiven, passiver
passivene » passivenene, passiverene, passiven, passiveand, passiverer
passive » passivene, passivere
massiveren » massigeren, massivement, passivieren, massivern, massivelyn, massivenn
massivere » massiver, massively, massiven

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 (passivene OR ((massiveren OR massivere) OR (massive OR passive)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or (passivene or ((massiveren or massivere) or (massive OR passive))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (passivene or ((massiveren or massivere) or (massive OR passive))))*.