Perhaps you should try some spelling variations:
passiver » passive, passively, passiert
passivere » passivee, passivelye, passierte, passiverer, massivere, passivieren
passiveren » passiveen, passivelyen, passierten, passiverern, massiveren, passivierenn, passivieren, passieren, passiverer
passiven » passive, passion
passivee » passive, passives, passivem

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: (((passiver OR passivere) OR (passiven OR passiveren)) OR passivee).
• Adding a wildcard symbol may retrieve word variants: (((passiver or passivere) or (passiven or passiveren)) or passivee)*.