Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
tranh cua » doanh cua, manh cua
cua nhung » va nhung
ho thiet » hoc thiet, hoa thiet, so thiet
ban cau » bang cau, ban can, van cau
can cau » van cau, ca cau, cac cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho thiet tach - canh tranh cua nhung cong thanh ((ban cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - canh tranh cua nhung cong thanh ((ban cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - canh tranh cua nhung cong thanh ((ban cau) or (can cau))*.