Perhaps you should try some spelling variations:
passiver » passive, passiven, passively
passiveren » passiveen, passivenen, passivelyen, passivieren, passieren, passiverer
passiveen » passiven, passivieren, passiveand
massiv » massive
massivere » massiveere, massiver, massive, massively

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: ((((passiver OR passiveen) OR passiveren) OR massiv) OR massivere).
• Adding a wildcard symbol may retrieve word variants: ((((passiver or passiveen) or passiveren) or massiv) or massivere)*.