Perhaps you should try some spelling variations:
kyung hwan » jung hwan
wang yong » wang yang, wang hyoung, wang yan
yong gang » gong gang, hong gang, yong phang
tan huang » tan hong, tan hua, tan yang
huang jin » huang jing, huang bin, huang lin
gang yan » wang yan, gang yao, wang yang
yan tan » tan tan, yan clan, yan guan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong gang yan tan huang jin ((kyung hay) OR (kyung hwan)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong gang yan tan huang jin ((kyung hay) OR (kyung hwan)) ;*.