Perhaps you should try some spelling variations:
lang hyoung » wang hyoung, kang young, hwang byoung
hyoung yan » kyoung yang, hyoung gun, kyoung yun
tan cheng » tang zheng, yuan cheng, tan hong
dang hadi » dang hai
yan guan » gan guan, yan yuan, yang guang
tan chen » ta chen, jane chen, jean chen
yun dang » yun jang, duc dang, yun song

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang hyoung yan guan ((tan chen) or (tan cheng)) yun dang hadi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang hyoung yan guan ((tan chen) OR (tan cheng)) yun dang hadi ;*.