Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveere » passiveeere, massiveere, passiveneere, passivieren, passiver, massivere
aktivierende » motivierende, praktizierende, motivierenden, aktivierungde
aktivierenden » motivierenden, praktizierenden, motivierendenn, aktivierungden, motivierende
aktivieren » aktivierung, motivieren

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