Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveand » passiveeand, massiveand, passiveneand, passiven
passiveeand » passiveeeand, massiveeand, passiveneeand
passiverer » passiveerer, massiverer, passivenerer, 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 (passiveand OR passiveeand)) OR passiverer).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passiveand OR passiveeand)) or passiverer)".
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passiveand OR passiveeand)) or passiverer)*.