Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiverwerb » passiveerwerb, passivenerwerb, passivererwerb, passiverer
passivenere » passiveenere, passivenenere, passiverenere, passiverer
massiv » massive

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 passiverwerb) OR massiv) OR passivenere).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passiverwerb) or massiv) or passivenere)*.