Perhaps you should try some spelling variations:
ghana health » china health, data health
health gain » health goals
hyoung tan » hyoung gun, young man, hong tan
yan ghana » yan guan, yan zhang
chan ming » chan eng, chan fong, chan kang
song min » song ming, gong min, jong min
wang » wing, 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 or wan) yan ghana health gain ((song min) or (((chan ming) or (kian ming)))) hyoung tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wan) yan ghana health gain ((song min) OR (((chan ming) OR (kian ming)))) hyoung tan ;.
• Adding a wildcard symbol may retrieve word variants: (wang or wan) yan ghana health gain ((song min) or (((chan ming) or (kian ming)))) hyoung tan ;*.