Perhaps you should try some spelling variations:
thanh tung » thanh cong
cua truong » cua trung, xuan truong, cac truong
hoc dieu » hoc thieu, hoc hien
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
san than » sang than, san thanh, ban than
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: hoc dieu hanh - thanh tung ((cua tong) or (cua truong)) cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - thanh tung ((cua tong) OR (cua truong)) cong san than cau.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - thanh tung ((cua tong) or (cua truong)) cong san than cau*.