Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
guang yuan » fang yuan, huang juan
young john » young jean
wang yang » wang yan, wang liang, wang yanling
zhang kim » zhang xin, kang kim, zhang i
wong john » wrong john, longo john, king john
kong john » king john, longo john, wrong john
li zhang » _ zhang
yuan li » yuan lin, guan li, yuan zi

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