Perhaps you should try some spelling variations:
ghana health » china health, data health
mind hyoung » min hyoung
hyoung tan » hyoung gun, young man, hong tan
yan ghana » yan guan, yan zhang
gain yang » dan yang, tan yang, yin yang
daun yang » dan yang, du yang, tan yang
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 ghana health ((gain yang) or (daun yang)) mind hyoung tan ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ghana health ((gain yang) OR (daun yang)) mind hyoung tan ;.
• Adding a wildcard symbol may retrieve word variants: wang yan ghana health ((gain yang) or (daun yang)) mind hyoung tan ;*.