Perhaps you should try some spelling variations:
yuan kang » yuan wang, yuan chang, chan kang
yuan kai » yuan fei, tan kai, yuan hui
yang jui » yang judy, yang di, yang yi
kang hay » eang hay, kang han, kang tae
nan yan » nan ya, wang yan, qian yan
yan yan » yan yuan, yang yang, wang yan
yang xi » yang di, yang yi
hai » hadi, haji, hari

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: nan yan yan ((yuan kai) OR (yuan kang)) ((yang jui) OR (yang xi)) ((kang hay) OR (dang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nan yan yan ((yuan kai) OR (yuan kang)) ((yang jui) or (yang xi)) ((kang hay) or (dang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: nan yan yan ((yuan kai) OR (yuan kang)) ((yang jui) or (yang xi)) ((kang hay) or (dang hai)) ;*.