Perhaps you should try some spelling variations:
yang guang » yan guan
yang liang » wang liang, yan liang, peng liang
young john » kong john, wong john, young jean
yang yang » wang yang, wang yan
jie zhang » jia zhang, li zhang, bin zhang
zhang kim » zhang xin, kang kim, zhang i
hua jie » huan jie

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 ((((yang guang) OR (yang liang))) OR (yang yang)) hua jie zhang kim young john ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((((yang guang) OR (yang liang))) or (yang yang)) hua jie zhang kim young john ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((((yang guang) OR (yang liang))) or (yang yang)) hua jie zhang kim young john ;*.