Perhaps you should try some spelling variations:
young john » kong john, young jean
yan huang » yang guang, yan guan, yan wang
yan liang » yang liang, wang liang, you liang
jie zhang » jia zhang, li zhang, bin zhang
zhang kim » zhang xin, kang kim, zhang i
wong john » wrong john, kong john, longo john
juan jie » huan jie, juan die, juan jose
wang » wing, wan, lang

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