Perhaps you should try some spelling variations:
passiv » massiv, passiven
passiver » massiver, passivener, passiven, passively, passiert
passivenener » massivenener, passivenenener, passivierender, passiverer
passive » massive, passivene
massivenerwerb » passiverwerb

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 passiver) OR (passivenener OR massivenerwerb)) OR passive).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv OR passiver) or (passivenener or massivenerwerb)) or passive)".
• Adding a wildcard symbol may retrieve word variants: (((passiv OR passiver) or (passivenener or massivenerwerb)) or passive)*.