Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
manh trung » manh tung, thanh trung, manh hung
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
hang nong » thang long
ban toan » bai toan, ban than, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - manh trung tuan ((hang nong) OR (han tong)) ban toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - manh trung tuan ((hang nong) OR (han tong)) ban toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - manh trung tuan ((hang nong) OR (han tong)) ban toan ban*.