Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
thanh tung » thanh cong
cua nhung » va nhung
ho thiet » hoc thiet, hoa thiet, so thiet
tung cua » trung cua, tuong cua, dung cua
cong van » cong vang, song van, cong tan
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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 - thanh tung cua nhung ((cong van) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - thanh tung cua nhung ((cong van) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - thanh tung cua nhung ((cong van) or (cong san)) phan cau*.