Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung joon, seung won
juan wang » yuan wang, juan meng, juan rana
sang minh » kang minah, anh minh, song min
wang hai » dang hai, wang hui, shang hai
ren sang » lee sang, le sang, ren weng
jeong su » jeong _, jeong mi, jeong 情
feng » eng, fang

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

• Performing a fuzzy search may retrieve terms with similar spellings: feng juan wang hai ren sang minh ((jeong su) or (seung yeon)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: feng juan wang hai ren sang minh ((jeong su) OR (seung yeon)) ;*.