Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivener » massivener, passivenener, passiverener, passiven, passiver, passiverwerb
passiverer » massiverer, passivenerer, 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 passive) OR (((passivener OR passiverer) OR passion) OR passiert)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or passive) or (((passivener OR passiverer) or passion) or passiert))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or passive) or (((passivener OR passiverer) or passion) or passiert))*.