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