Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang yan » wang yan, yang fan, yang yao
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
jiu long » jiu cong, au long, eu long
long shu » cong shu, tong shui, long du
yan jiu » yang jie, yang jin, pang jiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yang yan) OR (yang yang)) hua gene yan jiu long shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang yan) OR (yang yang)) hua gene yan jiu long shu ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yang yan) OR (yang yang)) hua gene yan jiu long shu ;*.