Perhaps you should try some spelling variations:
passiv » passiven
passive » passivene
passivere » passivenere, passiverer, massivere, passivieren, passivene, passierte
passiver » passivener, passiven, passiert
passively » passivenely, massively, passivity, passiven
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 massiv) OR (passive OR (passivere OR (passiver OR passively)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or (passive or (passivere or (passiver OR passively))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (passive or (passivere or (passiver OR passively))))*.