Perhaps you should try some spelling variations:
dong hoang » hong hong
dong wang » dong yang, hong wang, dong jung
hua gene » human gene, a gene, hua ren
yang jin » yang jie, yang jun, ying jin
wong sam » wong sau, wong lai, kong sar
won sau » wong sau, wong siu
yan ji » yan jiu, ban ji, pan ji

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((dong wang) or (dong hoang)) hua gene ((yan ji) or (yang jin)) ((won sau) OR (wong sam)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((dong wang) OR (dong hoang)) hua gene ((yan ji) OR (yang jin)) ((won sau) OR (wong sam)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((dong wang) or (dong hoang)) hua gene ((yan ji) or (yang jin)) ((won sau) OR (wong sam)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((dong wang) or (dong hoang)) hua gene ((yan ji) or (yang jin)) ((won sau) OR (wong sam)) ;*.