Perhaps you should try some spelling variations:
long thanh » luong thanh, long han, long trinh
hang china » han china, change china, ghana china
tang zheng » wang zheng, fang sheng, fang zhen
zhen yong » chen yong, zheng rong, zheng cong
kim gong » kim song, kim dong, kim jong
gong hui » tong hui, tong shui, 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 ((hang china) or (tang zheng)) zhen yong kim gong hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: long thanh ((hang china) OR (tang zheng)) zhen yong kim gong hui ;.
• Adding a wildcard symbol may retrieve word variants: long thanh ((hang china) or (tang zheng)) zhen yong kim gong hui ;*.