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 guan » gan guan, yan yuan, yang guang
yao yang » yang yang
yang jie » yang jin, yang di, yang jui
nan yan » nan ya, wang yan, qian yan

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 ((nan yan) OR (yan guan)) yao yang jie ((chang hadi) OR (khan hadi)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong ((nan yan) or (yan guan)) yao yang jie ((chang hadi) or (khan hadi)) ;*.