Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierender » passiveierender, massivierender, passivenierender, passivierende, aktivierender, passivieren
passiverwerb » passiveerwerb, massiverwerb, passivenerwerb, passiverer
passivene » passiveene, massivene, passivenene, passiven, passiveand, passiverer
massiverwerb » massivere, massierer

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 (passivierender OR (massiverwerb OR passiverwerb))) OR passivene).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passivierender or (massiverwerb OR passiverwerb))) or passivene)".
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passivierender or (massiverwerb OR passiverwerb))) or passivene)*.