Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
massiven » massive, massively, massiv
massiveen » massivement, massivsten, massigeren

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 (passiven OR massiveen)) OR passivieren)).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((massiven or (passiven or massiveen)) or passivieren))*.