Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveneren » passiveeneren, massiveneren, passiveneneren, passivieren, passieren
passiverer » passiveerer, massiverer, passivenerer, passivieren, passiver, passieren
passiveere » passiveeere, massiveere, passiveneere, passivieren, passiver, massivere
passiverwerb » passiveerwerb, massiverwerb, passivenerwerb

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 (passiveneren OR passiverer)) OR (passiveere OR passiverwerb)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passiveneren or passiverer)) or (passiveere or passiverwerb))*.