Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivere » massivere, passivenere, passiverere, passiverer, passiver
passiverly » massiverly, passivenerly, passivererly, passively, passiver, passivel
passiverwerb » massiverwerb, passivenerwerb, passivererwerb, passiverer

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 passivere) OR (passiverly OR passiverwerb))) OR massive).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passive or passivere) or (passiverly or passiverwerb))) or massive)*.