Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
dong yang » dong hoang, yang yang, dan yang
dong nan » dong sin, dong bin
dong cao » dong xiao, dan cao, yong cai
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
li cong » li rong, li song, jiu cong
yan li » yang li, yuan li, gan li

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((dong nan) or (dong cao))) or (((dong yang) or (wang yang)))) ya hua gene yan li cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong nan) OR (dong cao))) OR (((dong yang) OR (wang yang)))) ya hua gene yan li cong shu ;.
• Adding a wildcard symbol may retrieve word variants: ((((dong nan) or (dong cao))) or (((dong yang) or (wang yang)))) ya hua gene yan li cong shu ;*.