Perhaps you should try some spelling variations:
china chang » china changqi, china china, china can
china zhang » cheng zhang, china han, china hand
chin chang » chain change, colin chang, chin chin
gain yang » dan yang, daun yang, tan yang
yan yuan » yan guan, fang yuan, nan yan
yuan yan » yuan kang, yuan wang, sun yan
yan gain » fan again, you gain, run gain
wang » wing, wan

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 OR lang) yan yuan yan gain yang ((((chin chang) OR (china zhang))) OR (china chang)) hay ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or lang) yan yuan yan gain yang ((((chin chang) OR (china zhang))) or (china chang)) hay ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or lang) yan yuan yan gain yang ((((chin chang) OR (china zhang))) or (china chang)) hay ;*.