Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
ho chieu » hoc thieu, doi chieu, mot chieu
hanh han » hanh nhan, hanh phan, hanh san
va thong » va thuong, va phuong, he thong
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan
han va » hang va, hanh va, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) OR (ho chieu)) sach - hanh han va thong thong ((san toan) or (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - hanh han va thong thong ((san toan) OR (dan toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) sach - hanh han va thong thong ((san toan) or (dan toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) sach - hanh han va thong thong ((san toan) or (dan toan)) cau*.