Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » thanh trung, manh hung, sinh trung
hoc chieu » hoc thieu, ho chieu, hoc hien
manh tung » manh hung, thanh tung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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: hoc chieu sach - ((manh trung) OR (manh tung)) va nhung ((cong dan) or (cong tan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((manh trung) OR (manh tung)) va nhung ((cong dan) OR (cong tan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((manh trung) OR (manh tung)) va nhung ((cong dan) or (cong tan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((manh trung) OR (manh tung)) va nhung ((cong dan) or (cong tan)) toan tap*.