Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveere » passiveeere, massiveere, passiveneere, passivieren, massivere, passiverer
passiver » passiveer, massiver, passivener, passive, passiven, passively
passivity » passiveity, massivity, passivenity
massiven » massive, passiven, massively
massiver » massive, massively, massiv

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 ((passiveere OR massiven) OR ((passiver OR passivity) OR massiver))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiveere or massiven) or ((passiver or passivity) or massiver)))*.