Perhaps you should try some spelling variations:
jeong hyeok » jeong dahyeon
jeong yeon » jeang yean, seung yeon, jeong dahyeon
dong yuan » don juan, dong hua, dong nan
yuan ting » yuan ming, huang ting, yuan kang
gene sang » lee sang, gene bank
sang minh » kang minah, anh minh, song min
ting hai » dang hai, hong hai, king has
hai gene » a gene, a1 gene, hai ren

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 ting hai gene sang minh ((jeong yeon) OR (jeong hyeok)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yuan ting hai gene sang minh ((jeong yeon) OR (jeong hyeok)) ;*".