Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
tong shui » tong hui, cong shu, gong hui
wong shiu » wong siu, cong shu, song shin
hua gene » human gene, hua ren, hy5 gene
yang jin » yang jie, yang jun, ying jin
yang ka » yang fan, yang yao
a gene » a genre, a gender, a gentle

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yang ka ((hua gene) or (a gene)) yang jin ((tong shui) or (wong shiu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang ka ((hua gene) OR (a gene)) yang jin ((tong shui) OR (wong shiu)) ;.
• Adding a wildcard symbol may retrieve word variants: dong yang ka ((hua gene) or (a gene)) yang jin ((tong shui) or (wong shiu)) ;*.