Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
passiveren » passiveeren, passiveneren, passivereren, passieren, passiverer, passiven
massiv » massive
massively » massiveely, massive

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 passivieren) OR passiveren) OR massiv) OR massively).
• Adding a wildcard symbol may retrieve word variants: ((((passiv or passivieren) or passiveren) or massiv) or massively)*.