Perhaps you should try some spelling variations:
cheng long » cheng leong, cheng ling, chen rong
chung tong » chung chong, chung mona, phung tung
zeng doug » jeng dong, zeng douglas
jun gang » und gang, jun gao, zum gang
doug bin » dong bin, dort bin, org bin
gang xi » yang xi, fang xia
qian » ian, kian, jian

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

• Performing a fuzzy search may retrieve terms with similar spellings: qian jun gang xi ((chung tong) or (cheng long)) zeng doug bin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: qian jun gang xi ((chung tong) OR (cheng long)) zeng doug bin ;*.