Perhaps you should try some spelling variations:
china chen » china shen, china china, china chang
thanh tan » thanh van
thanh dam » than daem, thanh van
chen yang » chen rong
yang jun » yang jui, pang jun, yang jin
jun song » jin song, yun song, hyun song
shin » skin, sein, thin

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: long ((thanh tan) or (thanh dam)) china chen yang jun song shin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: long ((thanh tan) OR (thanh dam)) china chen yang jun song shin ;.
• Adding a wildcard symbol may retrieve word variants: long ((thanh tan) or (thanh dam)) china chen yang jun song shin ;*.