Perhaps you should try some spelling variations:
thanh tung » thanh cong
cong cong » cong dong, trong cong, dung cong
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
tung cac » dung cac, vung cac, cung cac
cac cong » cua cong
cong san » cong tac
phan dau » phan tu
hang dau » hang va, hang tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - thanh tung cac cong cong san ((phan dau) OR (hang dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (ho thiet)) tach - thanh tung cac cong cong san ((phan dau) OR (hang dau))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (ho thiet)) tach - thanh tung cac cong cong san ((phan dau) OR (hang dau))*.