Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveren » passiveeren, massiveren, passiveneren, passiverer, passiven, passiver
passiveen » passiveeen, massiveen, passiveneen, passiven, passiveand, passiverer
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passagieren
passieren » passiert, passiven

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