Perhaps you should try some spelling variations:
dong huang » dong hoang, dang hung, dong hua
dong yang » dong hoang, wang yang, yang yang
gene wang » gene bank, wen wang
yang hua » wang hua, yang hui, ying hua
hua gene » human gene, a gene, hua ren
yan hong » tan hong, yan cong, can hong
hong yu » wong yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong huang) or (dong yang)) yang hua gene wang yan hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong huang) OR (dong yang)) yang hua gene wang yan hong yu ;*.