Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
manh toan » thanh toan, anh tuan, tinh toan
manh cua » doanh cua, ban cua
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - canh manh cua ((hang cong) OR (hang nong)) ((dan than) or (manh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - canh manh cua ((hang cong) OR (hang nong)) ((dan than) OR (manh toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - canh manh cua ((hang cong) OR (hang nong)) ((dan than) or (manh toan)) tap".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - canh manh cua ((hang cong) OR (hang nong)) ((dan than) or (manh toan)) tap*.