Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
wang yong » wang yang, wang hyoung, wang yan
gene kang » gene bank
kang minh » kang minah, sang minh, anh minh
yan yang » yao yang, dan yang, tan yang
hua gene » human gene, a gene, hua ren
cong g » cong _, hong g

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 ((yan yang) OR (((yang yang) OR (wang yong)))) hua gene kang minh cong g ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) or (((yang yang) OR (wang yong)))) hua gene kang minh cong g ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yang) or (((yang yang) OR (wang yong)))) hua gene kang minh cong g ;*.