Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveren » passiveeren, massiveren, passivereren, passivieren, passieren, passiverer
massivierender » passivierender, passivierende, passivierenden

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