Perhaps you should try some spelling variations:
passiv » massiv, passiver
passiveen » massiveen, passivereen, passivieren, passiveand, passively
passiven » massiven, passiveren, passion
passive » massive, passivere
passiverer » massiverer, passivererer, passiverwerb, passivieren, passiver

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