Perhaps you should try some spelling variations:
reformen beim » reformen bei, reformen im, reformen teil
die reformen » die reform, die formen, der reformen
david dang » david mant, david ng
yuan wang » yuan kang, yuan chang, qian wang
david ian » david a, david n
yan wang » yang yang, qian wang, yan liang
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 (yuan wang)) yang die reformen beim ((david dang) OR (david ian)) (hai OR haji) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yan wang) or (yuan wang)) yang die reformen beim ((david dang) OR (david ian)) (hai or haji) ;~".
• Adding a wildcard symbol may retrieve word variants: ((yan wang) or (yuan wang)) yang die reformen beim ((david dang) OR (david ian)) (hai or haji) ;*.