Perhaps you should try some spelling variations:
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling
wong shiu » wong siu, cong shu, song shin
hua gene » human gene, hua ren, hy5 gene
yang jun » pang jun, yang jin, yang judy
yang jui » yang judy, yang di, yang xi
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)) ya ((hua gene) OR (a gene)) ((yang jun) OR (yang jui)) wong shiu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) OR (wang yang)) ya ((hua gene) or (a gene)) ((yang jun) or (yang jui)) wong shiu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) OR (wang yang)) ya ((hua gene) or (a gene)) ((yang jun) or (yang jui)) wong shiu ;*.