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
sang minh » kang minah, anh minh, song min
chang mae » chang ha, changes made
lang yan » wang yan, wang yang, zhang yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan ghana health gain ((sang minh) or (chang mae)) young male ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan ghana health gain ((sang minh) OR (chang mae)) young male ;*.