Perhaps you should try some spelling variations:
jin hyoung » min hyoung, jin kyung
hyoung tan » hyoung gun, young man, hong tan
yan ghana » yan guan
yan zhang » yuan chang, bin zhang, han chang
data yang » apa yang
yang jin » yang jie, yang jun, ying jin
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 (yan zhang)) health data yang jin hyoung tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan ghana) OR (yan zhang)) health data yang jin hyoung tan ;*.