Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivieren » massivieren, passivenieren, passiverieren, passivierende, passivierung, passagieren
passiveneer » massiveneer, passiveneneer, passivereneer, 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 passive) OR ((passivieren OR passieren) OR massiven)) OR passiveneer).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or ((passivieren or passieren) or massiven)) or passiveneer)*.