Perhaps you should try some spelling variations:
hyoung yan » kyoung yang, hyoung gun, kyoung yun
yulu chen » yu chen
chan kong » chan fong, chan kang, tan kong
china hui » china hubei, china how, china han
china has » china have, china how
jui chen » yi chen
wang » wing, wan, lang

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: wang hyoung yan ((yulu chen) OR (jui chen)) chan kong ((china hui) OR (china has)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung yan ((yulu chen) or (jui chen)) chan kong ((china hui) OR (china has)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang hyoung yan ((yulu chen) or (jui chen)) chan kong ((china hui) OR (china has)) ;*.