Perhaps you should try some spelling variations:
passiv » passiven
passiver » passivener, passiven, passiert
passivener » passivenener, passiverer, passiven
passiverwerb » passivenerwerb, passivenwerb, passiertwerb, passiverer
passive » passivene
passively » passivenely, passivity, passiven
massively » massive, massiveely
massiv » massive

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