Perhaps you should try some spelling variations:
chang hadi » chang ha, shang hai, change hands
wang yong » wang yang, wang hyoung, wang yan
khan hadi » khan hafiz
yan yuan » yan guan, fang yuan, nan yan
gan guan » yan guan, quan guan, fan guon
yao yang » yang yang
yang jin » yang jie, yang jun, ying jin

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 ((yan yuan) OR (gan guan)) yao yang jin ((chang hadi) OR (khan hadi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong ((yan yuan) or (gan guan)) yao yang jin ((chang hadi) OR (khan hadi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong ((yan yuan) or (gan guan)) yao yang jin ((chang hadi) OR (khan hadi)) ;*.