Perhaps you should try some spelling variations:
zheng xuan » zheng quan, zheng alan
cheng guan » cheng han, thong guan
yuan kang » yuan wang, yuan chang, chan kang
wan wang » wen wang, yan wang, wang yang
kong sek » kong weak, kong sar, kong k
yi chen » jui chen
yan yi » yang yi, tan yi, yan zi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((wan wang) or (yuan kang)) yan yi chen ((zheng xuan) OR (cheng guan)) kong sek ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wan wang) OR (yuan kang)) yan yi chen ((zheng xuan) OR (cheng guan)) kong sek ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan wang) or (yuan kang)) yan yi chen ((zheng xuan) OR (cheng guan)) kong sek ;*".