Perhaps you should try some spelling variations:
passiver » passive, passiven, passively
passiverern » passiveern, passivenern, passivelyern, passiverer, passiverwerb, passieren
massiv » massive
passivenere » passiverer, passiverwerb

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