Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivenenener » passiveenenener, massivenenener, passivenenenener
passiverwerb » passiveerwerb, massiverwerb, passivenerwerb, passiverer
passiveerer » passiveeerer, massiveerer, passiveneerer, passiverer, passivieren

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