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