Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passivenenener » massivenenener, passivenenenener, passiverenenener
passiverwerb » massiverwerb, passivenerwerb, passivererwerb, passiverer
passive » massive, passivene, passivere
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 massiven) OR (passivenenener OR passiverwerb)) OR passive).
• Adding a wildcard symbol may retrieve word variants: (((passiv or massiven) or (passivenenener or passiverwerb)) or passive)*.