Perhaps you should try some spelling variations:
chen yugang » chen huigang, chen yang, chen yulan
yugang lin » huang lin, yang lin
jeong yeon » jeong hyeok, jeang yean, seung yeon
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
seung won » seung joon, seung yeon, seung youn
hua chen » jui chen, yu chen, a chen
yi hua » li hua, ya hua, yi hui

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (wang yang)) yi hua chen yugang lin ((jeong yeon) or (seung won)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (wang yang)) yi hua chen yugang lin ((jeong yeon) OR (seung won)) ;.
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (wang yang)) yi hua chen yugang lin ((jeong yeon) or (seung won)) ;*.