Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passiverer » massiverer, passivenerer, passivererer, passiverwerb, passivieren, passiver
massiverer » massivere, massierer, massiver

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 (passive OR (massiverer OR passiverer))).
• Adding a wildcard symbol may retrieve word variants: (passiv or (passive or (massiverer or passiverer)))*.