Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh trung » thanh tung
hien hanh » dieu hanh
hang nong » thang long, han tong
tam hang » nam thang, pham hang, tam huong
nong dan » cong dan, nong san, nguong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien thanh) or (hien hanh)) - thanh trung tam hang nong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - thanh trung tam hang nong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - thanh trung tam hang nong dan toan cao*.