Perhaps you should try some spelling variations:
passiv » passiver
passive » passivere
passiven » passiveren, passion
passiveren » passivereren, passieren, passiverer, passiver
passivieren » passiverieren, passivierende, passivierung, passieren
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 passive) OR (passiven OR (passiveren OR passivieren))) OR massiv).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or passive) or (passiven or (passiveren OR passivieren))) or massiv)".
• Adding a wildcard symbol may retrieve word variants: (((passiv or passive) or (passiven or (passiveren OR passivieren))) or massiv)*.