Perhaps you should try some spelling variations:
dong yang » dong hoang, dan yang, dong jung
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
yang hong » wang hong, yang hongli, quang hong
hua gene » human gene, hy5 gene
hong hai » shang hai, zhong tai, dang hai
hua ren » hua chen
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 yang ((((hua gene) OR (hua ren))) OR (a gene)) wang yang hong hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yang ((((hua gene) OR (hua ren))) or (a gene)) wang yang hong hai ;~".
• Adding a wildcard symbol may retrieve word variants: dong yang yang ((((hua gene) OR (hua ren))) or (a gene)) wang yang hong hai ;*.