Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passiverene » massiverene, passivenerene, passivererene, passivierende, passieren, passiverer
passivieren » massivieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiven » massive, passiven, massively

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