Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passively » passiveely, massively, passivenely, passive, passivity
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passagieren
passiveneer » passiveeneer, massiveneer, passiveneneer, passiverer, passiverwerb
passieren » passiert, passiven
massiven » massive, passiven, massively

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 passively) OR ((passivieren OR passieren) OR massiven)) OR passiveneer).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passively) or ((passivieren OR passieren) or massiven)) or passiveneer)".
• Adding a wildcard symbol may retrieve word variants: (((passiv or passively) or ((passivieren OR passieren) or massiven)) or passiveneer)*.