Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passivener » massivener, passivenener, passiverener, passiverer, passiven, passiver
passivierende » massivierende, passivenierende, passiverierende, passivierender, passivieren, aktivierende
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 passivener) OR passivierende) OR massive) OR passive).
• Adding a wildcard symbol may retrieve word variants: ((((passiv or passivener) or passivierende) or massive) or passive)*.