Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
yang hua » wang hua, yang hui, ying hua
hua gene » human gene, a gene, hua ren
yang jin » yang jie, yang jun, ying jin
new main » new spain, new math
wong yue » wang 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 yang hua gene ((yang jin) or (new main)) ((hong yu) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang yang hua gene ((yang jin) OR (new main)) ((hong yu) OR (wong yue)) ;*.