Perhaps you should try some spelling variations:
china health » china's health, child health, capita health
health gain » health goals
ban china » can china, dan china, han china
yang mind » yang cindy, yang jin, sang minh
wang ban » wang yan, wang dan, wang yang
ying jin » yang jin, jing ji, yang jie
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 ban china health gain ((yang mind) or (ying jin)) hong tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ban china health gain ((yang mind) OR (ying jin)) hong tan ;.
• Adding a wildcard symbol may retrieve word variants: wang ban china health gain ((yang mind) or (ying jin)) hong tan ;*.