Perhaps you should try some spelling variations:
passiv » passive, passiver
passively » passiveely, passiverely, massively, passive, passivity
passiven » passiveen, passiveren, passive, passion
passiverer » passiveerer, passivererer, passiverwerb, passivieren, passiver
massiv » massive
massiven » massiveen, 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: ((((passiv OR massiv) OR passively) OR (passiven OR massiven)) OR passiverer).
• Adding a wildcard symbol may retrieve word variants: ((((passiv or massiv) or passively) or (passiven or massiven)) or passiverer)*.