Perhaps you should try some spelling variations:
wang yong » wang yang, wang hyoung, wang yan
kang chen » chang chen, jane chen, tang chun
yong cai » dong cao, yong c, yong wah
pay gaps » pay gap, pay gain
via gain » via gan, via ai
yang jin » yang jun, ying jin, shang jin
yang jie » yang di, yang jui, yang xi
kang han » kong hang, zhang han, dang hai

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: wang yong cai ((pay gaps) OR (via gain)) ((yang jin) OR (yang jie)) ((kang han) OR (kang chen)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong cai ((pay gaps) or (via gain)) ((yang jin) or (yang jie)) ((kang han) OR (kang chen)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong cai ((pay gaps) or (via gain)) ((yang jin) or (yang jie)) ((kang han) OR (kang chen)) ;*.