Perhaps you should try some spelling variations:
cong hyeok » jeong hyeok
dong yuan » dong hua, dong nan, dong yang
gene sang » lee sang, gene bank
sang minh » kang minah, anh minh, song min
don juan » von juan, san juan, de juan
wang hai » dang hai, wang hui, shang hai
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) or (don juan)) wang hai gene sang minh cong hyeok ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yuan) OR (don juan)) wang hai gene sang minh cong hyeok ;*.