Perhaps you should try some spelling variations:
den reformen » der reformen, von reformen, die reformen
wei reformen » der reformen, iii reformen, weitere formen
alan david » kaplan david, juan david, jan david
yan zhang » yuan chang, bin zhang, han chang
zhong zhi » zhang zhi, hong ghi, zhong tai
wan yan » wang yan, nan yan, wai yan
zhong » zlong
hong » long

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: wan yan zhang ((wei reformen) OR (den reformen)) alan david ((zhong zhi) OR (hong w)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan zhang ((wei reformen) OR (den reformen)) alan david ((zhong zhi) or (hong w)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan yan zhang ((wei reformen) OR (den reformen)) alan david ((zhong zhi) or (hong w)) ;*.