Perhaps you should try some spelling variations:
passiver » passive, passively, passiert
passiven » passive, passion
passiveierende » passivierende, passivierender, passivierenden
massiv » massive
massivere » massiveere, massiver, massive, 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: ((((passiver OR passiven) OR passiveierende) OR massiv) OR massivere).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((passiver OR passiven) or passiveierende) or massiv) or massivere)".
• Adding a wildcard symbol may retrieve word variants: ((((passiver OR passiven) or passiveierende) or massiv) or massivere)*.