Perhaps you should try some spelling variations:
china health » china's health, child health, capita health
health gain » health goals
hyoung tan » hyoung gun, young man, hong tan
yan china » can china, dan china, han china
sang min » sang minh, song min, tang min
jong min » gong min, song min, song ming
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 china health gain ((sang min) or (jong min)) hyoung tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan china health gain ((sang min) OR (jong min)) hyoung tan ;.
• Adding a wildcard symbol may retrieve word variants: wang yan china health gain ((sang min) or (jong min)) hyoung tan ;*.