Perhaps you should try some spelling variations:
lang hyoung » wang hyoung, kang young, hwang byoung
hyoung gan » hyoung gun, young man
tan cheng » tang zheng, yuan cheng, tan hong
dang haji » dang hai, dato haji
gan guan » yan guan, quan guan, fan guon
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 gan guan ((tan chen) or (tan cheng)) yun dang haji ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang hyoung gan guan ((tan chen) OR (tan cheng)) yun dang haji ;*.