Perhaps you should try some spelling variations:
passiv » massiv
passiven » massiven, passion
passive » massive
passivene » massivene, passione, passiveand, passively, passives
passiverer » massiverer, passiverwerb, passivieren, passieren, passivelyer, passierter
passiver » massiver, passively, passiert
passiveene » massiveene, passiveand, passivierende

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