Perhaps you should try some spelling variations:
chen yugang » chen huigang, chen yang, chen yulan
dong hoang » hong hong
chen huang » chen shuang, chen huigang, chen chuan
jeong yeon » jeong hyeok, jeang yean, seung yeon
wang yang » wang yan, wang liang, wang yanling
min jeong » kin keong, min hong, mun leong
yi hui » li hui

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong hoang) or (wang yang)) yi hui ((chen huang) OR (chen yugang)) min jeong yeon ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (wang yang)) yi hui ((chen huang) OR (chen yugang)) min jeong yeon ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong hoang) or (wang yang)) yi hui ((chen huang) OR (chen yugang)) min jeong yeon ;".
• Adding a wildcard symbol may retrieve word variants: ((dong hoang) or (wang yang)) yi hui ((chen huang) OR (chen yugang)) min jeong yeon ;*.