Perhaps you should try some spelling variations:
passiv » passive
passiver » passiveer, passive, passively, passiert
passiven » passiveen, passive, passion
passiveren » passiveeren, passiveen, passivelyen, passierten, passieren, passageren, massivere
passiverer » passiveerer, passiveer, passivelyer, passierter, passiverwerb, passieren, passagerer
passivieren » passiveieren, passivierende, passivierung, passieren
massiv » 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 passiver) OR massiv) OR (passiven OR (passiveren OR (passiverer OR passivieren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passiver) or massiv) or (passiven or (passiveren or (passiverer OR passivieren))))".
• Adding a wildcard symbol may retrieve word variants: (((passiv or passiver) or massiv) or (passiven or (passiveren or (passiverer OR passivieren))))*.