Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan
yang liang » wang liang, yan liang, yang yang
human gene » human genome, human gender, human bone
pang kin » pang jun, kang kim, pang jiu
kin hong » kia hong, tin hong, min hong
yu chen » yu cheng, yi chen, yulu chen
hong yu » wong yue

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wei ((yang guang) OR (yang liang)) ((human gene) or (yu chen)) pang kin hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wei ((yang guang) OR (yang liang)) ((human gene) OR (yu chen)) pang kin hong yu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wei ((yang guang) OR (yang liang)) ((human gene) or (yu chen)) pang kin hong yu ;*".