Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
gene yang » gene bank
yang amin » yang jin, yang lin, yang mind
amin hong » min hong, among hong, tin hong
hua gene » human gene, a gene, hua ren
hong ghi » zhong zhi, hong g, hong hai
xi hua » xie hua, li hua

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 (yang yang)) xi hua gene yang amin hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (yang yang)) xi hua gene yang amin hong ghi ;.
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (yang yang)) xi hua gene yang amin hong ghi ;*.