Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiverwerb » passiveerwerb, massiverwerb, passivererwerb, passiverer
passiven » passiveen, massiven, passiveren, passive, passion
passivee » passiveee, massivee, passiveree, passive, passiver, passives
massivere » 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: (((passiv OR (massivere OR passiverwerb)) OR passiven) OR passivee).
• Adding a wildcard symbol may retrieve word variants: (((passiv or (massivere or passiverwerb)) or passiven) or passivee)*.