Perhaps you should try some spelling variations:
done hoang » dong hoang
hoang tan » hong tan, huang tao, liang tan
hua gene » human gene, a gene, hua ren
yang jie » yang jin, yang di, yang jui
yang jun » yang jui, pang jun, yang jin
gong hui » tong hui, tong shui, wang hui
tan hua » tuan hua, wang hua, tan chia

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

• Performing a fuzzy search may retrieve terms with similar spellings: done hoang tan hua gene ((yang jie) or (yang jun)) ((cong shu) or (gong hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: done hoang tan hua gene ((yang jie) OR (yang jun)) ((cong shu) OR (gong hui)) ;.
• Adding a wildcard symbol may retrieve word variants: done hoang tan hua gene ((yang jie) or (yang jun)) ((cong shu) or (gong hui)) ;*.