Perhaps you should try some spelling variations:
yan yong » yan cong, tan yong, wang yong
hua gene » human gene, hua ren, hy5 gene
yang jie » yang jin, yang xi, yang yi
yang jui » yang judy, yang xi, yang yi
long shu » cong shu, tong shui, long du
a gene » a genre, a gender, a gentle
wang » wing, wan, lang

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: wang yan yong ((hua gene) OR (a gene)) ((((yang jie) OR (yang jui))) OR (yang di)) long shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yong ((hua gene) or (a gene)) ((((yang jie) OR (yang jui))) or (yang di)) long shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan yong ((hua gene) or (a gene)) ((((yang jie) OR (yang jui))) or (yang di)) long shu ;*.