Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passively » massively, passivenely, passiverely, passivity, passiven
passiveren » massiveren, passiveneren, passivereren, passivieren, passieren, passiverer
passive » massive, passivene, passivere

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