Perhaps you should try some spelling variations:
wang dong » wang yong, wang hong, wang yang
dong yang » dong hoang, wang yang, yang yang
yang hua » wang hua, yang hui, ying hua
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
wong siu » wong shiu, kong siu, wong siew
wong sau » wong sam, wong shiu, wong lai
won sau » wong sam
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 gene yan ji ((((won sau) OR (wong siu))) OR (wong sau)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang dong yang hua gene yan ji ((((won sau) OR (wong siu))) or (wong sau)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang dong yang hua gene yan ji ((((won sau) OR (wong siu))) or (wong sau)) ;*.