Perhaps you should try some spelling variations:
done hoang » dong hoang
alan hua » alan h, alan a, tan hua
hua gene » human gene, a gene, hua ren
yang jun » yang jui, pang jun, yang jin
hong shu » cong shu, tong shui, wong shiu
hong ghi » zhong zhi, hong g, hong hai
yan jiu » yang jie, yang jin, pang jiu

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: done hoang alan hua gene ((yan jiu) OR (yang jun)) ((hong shu) OR (hong ghi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "done hoang alan hua gene ((yan jiu) or (yang jun)) ((hong shu) OR (hong ghi)) ;~".
• Adding a wildcard symbol may retrieve word variants: done hoang alan hua gene ((yan jiu) or (yang jun)) ((hong shu) OR (hong ghi)) ;*.