Perhaps you should try some spelling variations:
ghana health » china health, data health
health gain » health goals
yan ghana » yan guan, yan zhang
sang minh » anh minh, song min, song ming
chang min » zhang ming, chang mae, chan ming
young man » young men, young woman, young male
wang » wing, wan

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 lang) yan ghana health gain ((((sang minh) or (kang minah))) or (chang min)) young man ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR lang) yan ghana health gain ((((sang minh) OR (kang minah))) OR (chang min)) young man ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR lang) yan ghana health gain ((((sang minh) or (kang minah))) or (chang min)) young man ;".
• Adding a wildcard symbol may retrieve word variants: (wang OR lang) yan ghana health gain ((((sang minh) or (kang minah))) or (chang min)) young man ;*.