Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
trung tuan » trung thanh, trung tam, tran tuan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hang nong » thang long
ban than » ban thanh, van thanh, ban hang
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 thiet tach - thanh trung tuan ((hang nong) or (han tong)) ban than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh trung tuan ((hang nong) OR (han tong)) ban than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh trung tuan ((hang nong) or (han tong)) ban than cau*.