Perhaps you should try some spelling variations:
ghana health » china health, data health
health gaps » health gap, health goals, health gains
yang liang » wang liang, yan liang, yang yang
man ghana » man han
dang hadi » dang hai
ying jin » jing ji, yang jie
yang jin » yang jie, yang jun, shang jin
kann » ann

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

• If you are trying to use Boolean operators, they must be ALL CAPS: kann man ghana health gaps ((yang liang) OR (((ying jin) OR (yang jin)))) dang hadi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "kann man ghana health gaps ((yang liang) or (((ying jin) OR (yang jin)))) dang hadi ;~".
• Adding a wildcard symbol may retrieve word variants: kann man ghana health gaps ((yang liang) or (((ying jin) OR (yang jin)))) dang hadi ;*.