Perhaps you should try some spelling variations:
reformen beim » reformen bei, reformen im, reformen teil
die reformen » die reform, die formen, der reformen
beim david » kim david
david dang » david ian, david mant, david ng
yang yang » wang yang, wang yan
yuan wang » yuan kang, yuan chang, qian wang
yan wang » qian wang, yan liang, yan zhang
yang die » yang di, yang jie, klang die

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: ((((yan wang) OR (yang yang))) OR (yuan wang)) yang die reformen beim david dang (hai OR haji) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yan wang) OR (yang yang))) or (yuan wang)) yang die reformen beim david dang (hai or haji) ;~".
• Adding a wildcard symbol may retrieve word variants: ((((yan wang) OR (yang yang))) or (yuan wang)) yang die reformen beim david dang (hai or haji) ;*.