Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivenner » passiveenner, massivenner, passivenenner, klassevenner, passiverwerb
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
passivene » passiveene, massivene, passivenene, passiven, passiveand, passive
passiveene » passiveeene, massiveene, passiveneene, passiven, 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 (passivenner OR passiverer)) OR (passivene OR passiveene))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passivenner or passiverer)) or (passivene OR passiveene))*".