Perhaps you should try some spelling variations:
passiven » passive, passion
massivere » massiver, massive, massively
massierer » kassierer, kassierers, massferrer
passiverer » passiverwerb, passivieren, 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: (passiven OR (massivere OR (massierer OR passiverer)))*.