Perhaps you should try some spelling variations:
wang dong » wang yong, wang hong, wang yang
yang hua » wang hua, yang hui, ying hua
yang jui » yang judy, yang di, yang xi
gene yan » gene bank, ren yan, see yan
wong sau » wong sam, wong siu, wong shiu
won sau » wong sam, wong siu
yan ji » yan jiu, ban ji, pan ji

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 dong ((yang hua) OR (yang jui)) gene yan ji ((won sau) OR (wong sau)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang dong ((yang hua) or (yang jui)) gene yan ji ((won sau) OR (wong sau)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang dong ((yang hua) or (yang jui)) gene yan ji ((won sau) OR (wong sau)) ;*.