Perhaps you should try some spelling variations:
china health » china's health, child health, capita health
liang china » living china, ming china, qing china
health gain » health goals
wang liang » wang yang
yang mind » yang cindy, sang minh, tang min
hong than » hong tan, long thanh, hong hai
yang jin » yang jie, yang jun, ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang china health gain ((yang mind) or (yang jin)) hong than ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang china health gain ((yang mind) OR (yang jin)) hong than ;.
• Adding a wildcard symbol may retrieve word variants: wang liang china health gain ((yang mind) or (yang jin)) hong than ;*.