Perhaps you should try some spelling variations:
hyoung tan » young man, hong tan
hyoung gun » young eun
yan ghana » yan guan, yan zhang
han chang » huang chang, than change, can change
data yang » apa yang
yang min » yang mind, yang jin, tang min
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yan ghana) or (han chang)) health data yang min ((hyoung tan) OR (hyoung gun)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan ghana) OR (han chang)) health data yang min ((hyoung tan) OR (hyoung gun)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan ghana) or (han chang)) health data yang min ((hyoung tan) OR (hyoung gun)) ;*".