Perhaps you should try some spelling variations:
huang yongfu » huang ying
huang yang » huang ying, huang chang, wang yang
yang yang » wang yang
gene wang » gene bank, wen wang
hua gene » human gene, a gene, hua ren
yan hong » tan hong, yan cong, can hong
hong yu » wong yue

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