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