Perhaps you should try some spelling variations:
health gap » health gaps, wealth gap, health gain
man woman » a woman
yan liang » yang liang, wang liang, you liang
c health » 3 health, 1 health, e health
yang jin » yang jie, ying jin, shang jin
yang jun » yang jui, pang jun, yang judy
chang ha » chang mae
woman c » woman _, woman 4, woman 5
jing ji » ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: man woman c health gap ((yan liang) or (((((yang jin) or (yang jun))) or (jing ji)))) chang ha ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: man woman c health gap ((yan liang) OR (((((yang jin) OR (yang jun))) OR (jing ji)))) chang ha ;.
• Adding a wildcard symbol may retrieve word variants: man woman c health gap ((yan liang) or (((((yang jin) or (yang jun))) or (jing ji)))) chang ha ;*.