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