Perhaps you should try some spelling variations:
dong hoang » hong hong
alia hua » li hua
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
wong sau » wong sam, wong siu, wong shiu
yan jiu » yang jie, yang jin, pang jiu
hong » long
tan » than

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 alia hua gene yan jiu ((wong sau) or (hong tan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong hoang alia hua gene yan jiu ((wong sau) OR (hong tan)) ;.
• Adding a wildcard symbol may retrieve word variants: dong hoang alia hua gene yan jiu ((wong sau) or (hong tan)) ;*.