Perhaps you should try some spelling variations:
passiv » massiv, passiven
passive » massive, passivene
passiver » massiver, passivener, passiven, passively, passiert
passiverer » massiverer, passivenerer, passivener, passivelyer, passierter, passiverwerb, passivieren, passieren

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 (((massive OR passive) OR passiver) OR (passiverer OR passiverer))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or (((massive OR passive) or passiver) or (passiverer or passiverer)))".
• Adding a wildcard symbol may retrieve word variants: (passiv or (((massive OR passive) or passiver) or (passiverer or passiverer)))*.