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