Perhaps you should try some spelling variations:
truong thanh » luong thanh, truong tran, tran thanh
long thanh » luong thanh, long han, long trinh
tang ching » hang china, tang chun, tang zheng
ching wen » ching kwan, ching fein, ching hea
wen yong » wang yong, chen yong, zhen yong
tong hui » wang hui

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) or (truong thanh)) tang ching wen yong kim ((cong shu) or (tong hui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((long thanh) OR (truong thanh)) tang ching wen yong kim ((cong shu) OR (tong hui)) ;.
• Adding a wildcard symbol may retrieve word variants: ((long thanh) or (truong thanh)) tang ching wen yong kim ((cong shu) or (tong hui)) ;*.