Perhaps you should try some spelling variations:
wang liang » wang yang
wang wang » wang yang, wang yan, wang yong
gene yang » gene bank
yang john » young john, king john, yang jin
john song » john wong, john bonn, john ngosong
song same » non same, song pae, wong sam
yong hua » dong hua, wang hua, tong hui
ying hua » ming hua, wang hua, ying zhu

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 wang) OR (wang liang)) ((yong hua) OR (ying hua)) gene yang john song same ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang wang) OR (wang liang)) ((yong hua) or (ying hua)) gene yang john song same ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang wang) OR (wang liang)) ((yong hua) or (ying hua)) gene yang john song same ;*.