Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveen » passiveeen, massiveen, passiveneen, passiven, passivieren, passiveand
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
massiveen » massiven, massivement, massivsten

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 ((passiveen OR massiveen) OR passiverer)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passiveen OR massiveen) or passiverer))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiveen OR massiveen) or passiverer))*.