Perhaps you should try some spelling variations:
jeong yeon » jeong hyeok, seung yeon, jeong dahyeon
dong yuan » fang yuan, meng yuan, song yun
dong yang » dong hoang, wang yang, yang yang
dang hair » dang hai
sang minh » kang minah, anh minh, tang min
jeong seo » hong seo
rene » irene, rent, gene

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong yuan) OR (dong yang)) dang hair rene sang minh ((jeong seo) or (jeong yeon)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yuan) OR (dong yang)) dang hair rene sang minh ((jeong seo) OR (jeong yeon)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yuan) OR (dong yang)) dang hair rene sang minh ((jeong seo) or (jeong yeon)) ;*".