Perhaps you should try some spelling variations:
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling
hua gene » human gene, hua ren, hy5 gene
yang jin » yang jie, ying jin, shang jin
yang jun » yang jui, pang jun, yang judy
song siu » kong siu, wong siu, song shin
a gene » a genre, a gender, a gentle

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: ((dong yang) OR (wang yang)) ka ((hua gene) OR (a gene)) ((yang jin) OR (yang jun)) song siu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (wang yang)) ka ((hua gene) or (a gene)) ((yang jin) OR (yang jun)) song siu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (wang yang)) ka ((hua gene) or (a gene)) ((yang jin) OR (yang jun)) song siu ;*.