Perhaps you should try some spelling variations:
guifang yang » cuifen yang, huang yang
yang yang » wang yan
gene wang » gene bank, wen wang
wang yang » wang yan, wang liang, wang yanling
yang hong » wang hong, yang hongli, quang hong
hua gene » human gene, a gene, hua ren
hong yu » wong yue
dong » doing, long, done

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

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