Perhaps you should try some spelling variations:
ghana health » china health, data health
health gain » health goals
sang minh » kang minah, anh minh, song ming
young man » young men, young woman, young male
song min » song ming, gong min, jong min
wan yan » wang yan, nan yan, wang yang
wai yan » wang yan, wei yang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wan yan) OR (wai yan)) ghana health gain ((sang minh) or (song min)) young man ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wan yan) OR (wai yan)) ghana health gain ((sang minh) OR (song min)) young man ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan yan) OR (wai yan)) ghana health gain ((sang minh) or (song min)) young man ;".
• Adding a wildcard symbol may retrieve word variants: ((wan yan) OR (wai yan)) ghana health gain ((sang minh) or (song min)) young man ;*.