Perhaps you should try some spelling variations:
ghana health » china health, data health
health gain » health goals
young male » young males, young age
yan ghana » yan guan, yan zhang
chang min » zhang ming, chang mae, chan ming
song min » song ming, gong min, jong min
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 ((((anh minh) or (song min))) or (chang min)) young male ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR lang) yan ghana health gain ((((anh minh) OR (song min))) OR (chang min)) young male ;.
• Adding a wildcard symbol may retrieve word variants: (wang or lang) yan ghana health gain ((((anh minh) or (song min))) or (chang min)) young male ;*.