Perhaps you should try some spelling variations:
china health » china's health, child health, capita health
health gain » health goals
yan china » can china, dan china, han china
yang mind » yang cindy, sang minh, tang min
yang jin » yang jie, yang jun, ying jin
wang » wing, wan, lang
tan » than

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 ((yang mind) or (yang jin)) hong tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan china health gain ((yang mind) OR (yang jin)) hong tan ;.
• Adding a wildcard symbol may retrieve word variants: wang yan china health gain ((yang mind) or (yang jin)) hong tan ;*.