Perhaps you should try some spelling variations:
passiver » passive, passiven, passively
passiveen » passiven, passivieren, passiveand
passivenen » passiivinen, passivieren, passiven
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 passivenen) OR massiv) OR massivere).
• Adding a wildcard symbol may retrieve word variants: ((((passiver or passiveen) or passivenen) or massiv) or massivere)*.