Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivene » massivene, passivenene, passiverene, passiven, passiveand, passively
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 passivene) OR (passivene OR (passiverer OR massiverer)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passive OR passivene) or (passivene or (passiverer or massiverer))))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passive OR passivene) or (passivene or (passiverer or massiverer))))*.