Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiveere » passiveeere, massiveere, passivereere, passivieren, passiver, massivere
passiven » passiveen, massiven, passiveren, passive, passion
passivity » passiveity, massivity, passiverity
massiver » massive, massiven, passiver

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