Perhaps you should try some spelling variations:
dong wang » dong yang, hong wang, dong hoang
wang yang » 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 wang yan ((((hua gene) OR (hua ren))) OR (a gene)) wang yang hong hai ;~.
• Adding a wildcard symbol may retrieve word variants: dong wang yan ((((hua gene) or (hua ren))) or (a gene)) wang yang hong hai ;*.