Perhaps you should try some spelling variations:
sudan chen » sudan ch
yan sudan » kano sudan, yan guan, yan yuan
tan hyung » tan hong, jay hyung, han heung
hyung kim » yong kim
zhong tai » hong tan, hong hai, zhong zhi
dang hadi » dang hai
chen tan » chen tain, chen yang, chen jian
wai yan » wang yan, wei yang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wai yan sudan chen tan hyung kim ((zhong tai) or (dang hadi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wai yan sudan chen tan hyung kim ((zhong tai) OR (dang hadi)) ;*.