Perhaps you should try some spelling variations:
reformen beim » reformen bei, reformen im, reformen teil
der reformen » der reform
beim david » kim david
yuan wang » yuan kang, yuan chang, qian wang
wang yang » wang yan, wang liang, wang yanling
yan wang » yang yang, qian wang, yan liang

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