Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passivenner » passiveenner, massivenner, passiverenner, passivener, passionner, klassevenner, passiverwerb
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passivieren, passiver
passivene » passiveene, massivene, passiverene, passivee, passione, passiveand, passive, passively
massivenner » klassevenner

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 ((passivenner OR massivenner) OR passiverer)) OR passivene)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passiven) or ((passivenner OR massivenner) or passiverer)) or passivene)*".