Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passively » massively, passivenely, passiverely, passivity, passiven
passiverer » massiverer, passivenerer, passivererer, passiverwerb, passivieren, passiver
passive » massive, passivene, passivere
massiven » passiven, massively, massiv

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