Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung joon, seung won
wang hair » dang hai
rene sang » lee sang
sang minh » kang minah, anh minh, song min
wang hui » wang hua, wang zhi, wang wei
jeong su » jeong _, jeong mi, jeong 情
feng » eng, fang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: feng juan ((wang hair) OR (wang hui)) rene sang minh ((jeong su) OR (seung yeon)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "feng juan ((wang hair) OR (wang hui)) rene sang minh ((jeong su) or (seung yeon)) ;~".
• Adding a wildcard symbol may retrieve word variants: feng juan ((wang hair) OR (wang hui)) rene sang minh ((jeong su) or (seung yeon)) ;*.