Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
wang yong » wang yang, wang hyoung, wang yan
yong yang » yang yang, dong yang, ying yang
yang linh » yang lin, yang jin, wang lin
hoang hai » hong hai, dang hai, hoang h
hua gene » human gene, hua ren, hy5 gene
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: wang yong yang ((hua gene) OR (a gene)) ((yang linh) OR (yang liang)) hoang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong yang ((hua gene) OR (a gene)) ((yang linh) or (yang liang)) hoang hai ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong yang ((hua gene) OR (a gene)) ((yang linh) or (yang liang)) hoang hai ;*.