Perhaps you should try some spelling variations:
thanh tung » thanh cong
tong cong » trong cong, cong cong, dung cong
chi tinh » chai tinh, chi minh, chi binh
tac nhan » tao nhan, cac nhan, dac nhan
doi chi » doi khi
tung va » trung va, tuong va, dung va
va tong » va thong, va tuong, va trong
tac han » tac ha, tac can, tac van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi tinh - thanh tung va tong cong ((tac han) or (tac nhan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tinh - thanh tung va tong cong ((tac han) OR (tac nhan)) tap.
• Adding a wildcard symbol may retrieve word variants: doi chi tinh - thanh tung va tong cong ((tac han) or (tac nhan)) tap*.