Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passivenere » massivenere, passivenenere, passiverenere, passiverer, passiverwerb
passivity » massivity, passivenity, passiverity
passive » massive, passivene, passivere
massiven » massive, passiven, massively
massiver » massive, passiver, 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 ((passivenere OR massiven) OR ((passivity OR passive) OR massiver))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivenere or massiven) or ((passivity or passive) or massiver)))*.