Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passivenener » passiveenener, massivenener, passiverenener, passiveener, passionener, passivierender, passiverer
passiverwerb » passiveerwerb, massiverwerb, passivererwerb, passiverer
passivere » passiveere, massivere, passiverere, passiverer, passiver

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 passiven) OR (passivenener OR passiverwerb)) OR (passivere OR passivere)).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passiven) or (passivenener or passiverwerb)) or (passivere or passivere))*.