Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
mot chieu » doi chieu, ho chieu
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

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