Perhaps you should try some spelling variations:
dong hoang » hong hong
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang jie » yang jin, yang di, yang jui
wong sau » wong sam, wong siu, wong shiu
hong hai » shang hai, zhong tai, dang hai
ali hua » li hua, ali hala

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong hoang ali hua gene yang jie ((wong sau) or (hong hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong hoang ali hua gene yang jie ((wong sau) OR (hong hai)) ;.
• Adding a wildcard symbol may retrieve word variants: dong hoang ali hua gene yang jie ((wong sau) or (hong hai)) ;*.