Perhaps you should try some spelling variations:
huang yang » huang ying, huang chang, wang yang
yang yang » wang yang, wang yan
gene wang » gene bank, wen wang
wang wang » wang yang, wang liang, wang yan
wang yong » wang yang, wang hyoung, wang yan
hua gene » human gene, a gene, hua ren
yong yu » hong yu, rong yu, young yun

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 ((huang yang) OR (yang yang)) hua gene wang wang yong yu ;~.
• Adding a wildcard symbol may retrieve word variants: dong ((huang yang) or (yang yang)) hua gene wang wang yong yu ;*.