Perhaps you should try some spelling variations:
tuan china » wuhan china, can china, taiwan china
chen yang » chen rong
tan chia » than china, can china, dan china
wong siu » wong shiu, kong siu, wong sau
tan hua » tuan hua, wang hua, tan puay
yang dr » yang di, yang d, yang du
dr wong » dr ong, dr congo, dr kongo
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 ((tan hua) OR (((tan chia) OR (tuan china)))) chen yang dr wong siu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hyoung ((tan hua) or (((tan chia) OR (tuan china)))) chen yang dr wong siu ;~".
• Adding a wildcard symbol may retrieve word variants: wang hyoung ((tan hua) or (((tan chia) OR (tuan china)))) chen yang dr wong siu ;*.