Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passivenener » massivenener, passivenenener, passiverenener, passivierender, passiverer, passivenner, passiveandner, passivererner
passiverwerb » massiverwerb, passivenerwerb, passivererwerb, passiverer
passive » massive, passivene, passivere
passivene » massivene, passivenene, passiverene, passiven, passiveand, passiverer

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 (passivenener OR passiverwerb)) OR (passive OR passivene)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passivenener or passiverwerb)) or (passive or passivene))*.