Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
truong cua » truong ca, truong quan, huong cua
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
ban thanh » ban hanh, ban hang
ho thiet » hoc thiet, hoa thiet, so thiet
van toan » van tuan, van tan, van thanh

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 - manh ((truong cua) OR (truong cao)) nhung cong ((van toan) or (ban thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - manh ((truong cua) OR (truong cao)) nhung cong ((van toan) OR (ban thanh)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - manh ((truong cua) OR (truong cao)) nhung cong ((van toan) or (ban thanh)) cao*".