Perhaps you should try some spelling variations:
wang liang » wang yang
human gene » human genome, human gender, human genetic
human bone » human bones, human body
duong van » cong van, duong anh
liang xi » liang li, liang wei, liang zhi
song min » song ming, gong min, jong min
cong sun » cong shu, cong van, wing sun

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 liang xi ((human gene) OR (human bone)) song min ((cong sun) OR (duong van)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang xi ((human gene) OR (human bone)) song min ((cong sun) or (duong van)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang xi ((human gene) OR (human bone)) song min ((cong sun) or (duong van)) ;*.