Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveren » passiveeren, massiveren, passivereren, passiver, passageren, massivere
passivereren » passiveereren, massivereren, passiverereren, passivierenden, passiverwerb, passiverwerben, passiveren, massivereen
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passiver, massivere
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passagieren
massively » massive
passagerer » passagere, passageren, passagieren
passieren » passiert

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 (passiveren OR (((passivereren OR (passiverer OR passagerer)) OR passieren) OR passivieren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or passiven) or (massively or (passiveren or (((passivereren or (passiverer OR passagerer)) or passieren) or passivieren))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or passiven) or (massively or (passiveren or (((passivereren or (passiverer OR passagerer)) or passieren) or passivieren))))*.