Perhaps you should try some spelling variations:
young john » kong john, young jean
jie zhang » jia zhang, li zhang, bin zhang
zhang xin » zhang jian, zhang ming, zhang fan
wong john » wrong john, kong john, longo john
yan guan » yan yuan, yang guang, yihan guan
gan guan » quan guan, fan guon, gui guan
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 guan) OR (gan guan)) juan jie zhang xin ((young john) OR (wong john)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan guan) OR (gan guan)) juan jie zhang xin ((young john) or (wong john)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan guan) OR (gan guan)) juan jie zhang xin ((young john) or (wong john)) ;*.