Perhaps you should try some spelling variations:
dann » kann, dans, ann
danne » kanne, danse, anne, dance, donne, dante
danner » kanner, danser, anner, dancer, donner, danter, manner, tanner, banner
anna » anne
bekannte » bekannten, bekannt

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: (( (dann OR (danne OR danner)) OR anna ) OR ( bekannte OR has )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( (dann or (danne OR danner)) or anna ) or ( bekannte or has ))".
• Adding a wildcard symbol may retrieve word variants: (( (dann or (danne OR danner)) or anna ) or ( bekannte or has ))*.