Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
tin hong » tan hong, kia hong, thi hong
tan hua » tuan hua, wang hua, tan chia
yan tin » yuan ting, yang jin, yang lin
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 yang) or (wang yanling)) tan hua gene yan tin hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (wang yanling)) tan hua gene yan tin hong yu ;*.