Perhaps you should try some spelling variations:
huang yang » huang ying, huang chang, huang jing
yang yang » wang yan
gene wang » gene bank, wen wang
wang yang » wang yan, wang liang, wang yanling
yang yong » wang yong, kang young, yan cong
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.

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((huang yang) or (yang yang)) hua gene wang yang yong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((huang yang) OR (yang yang)) hua gene wang yang yong yu ;*.