Perhaps you should try some spelling variations:
passively » massively, passive, passivity
passiven » passive, passion
passivityen » passivity, passivite
passivischen » passivische, passivischer, passivrauchen
passivieren » passivierende, passivierung, passieren
passivee » passive, passiver, passives

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: ((passively OR (passiven OR ((passivityen OR passivischen) OR passivieren))) OR passivee).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passively or (passiven or ((passivityen OR passivischen) or passivieren))) or passivee)".
• Adding a wildcard symbol may retrieve word variants: ((passively or (passiven or ((passivityen OR passivischen) or passivieren))) or passivee)*.