Perhaps you should try some spelling variations:
huang yongfu » huang yang, huang ying
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
gene wang » gene bank, wen wang
wang wang » wang liang, wang yan, wang yong
wang hong » wang yong, wang hyoung, wang lihong
hua gene » human gene, a gene, hua ren
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 yongfu) OR (((yang yang) OR (wang yang)))) hua gene wang wang hong yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((huang yongfu) or (((yang yang) OR (wang yang)))) hua gene wang wang hong yu ;~".
• Adding a wildcard symbol may retrieve word variants: dong ((huang yongfu) or (((yang yang) OR (wang yang)))) hua gene wang wang hong yu ;*.