Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cua nhung » va nhung
ho chiet » ho chieu, ho thiet, hoa thiet
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) OR (hoc thiet)) tach - ((thanh trung) or (thanh tung)) cua nhung cong tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thiet)) tach - ((thanh trung) OR (thanh tung)) cua nhung cong tac than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (hoc thiet)) tach - ((thanh trung) or (thanh tung)) cua nhung cong tac than cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) OR (hoc thiet)) tach - ((thanh trung) or (thanh tung)) cua nhung cong tac than cau*.