Perhaps you should try some spelling variations:
tong shui » tong hui, cong shu, gong hui
yan yong » yan cong, tan yong, wang yong
hua gene » human gene, hua ren, hy5 gene
yang jie » yang jin, yang di, yang jui
jie tong » jie song, jiao tong, die tone
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 tong shui ;~.
• Adding a wildcard symbol may retrieve word variants: wang yan yong ((hua gene) or (a gene)) yang jie tong shui ;*.