Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
hang nong » thang long
ban than » ban thanh, van thanh, ban hang
than tap » toan tap, han tap, phan 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 ((chieu tinh) or (chieu sach)) - hanh trung cua ((hang nong) OR (han tong)) ban than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (chieu sach)) - hanh trung cua ((hang nong) OR (han tong)) ban than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (chieu sach)) - hanh trung cua ((hang nong) OR (han tong)) ban than tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (chieu sach)) - hanh trung cua ((hang nong) OR (han tong)) ban than tap*.