Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passivieren, passiver
passivereren » passiveereren, massivereren, passiverereren, passiverwerben, passivierenen, passiveren, passivieren, passivierenden, passieren
massively » massive

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 (massively OR (passiverer OR passivereren))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or passiven) or (massively or (passiverer or passivereren)))*.