Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, hanh trinh, minh trang
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((hanh trang) OR (canh tranh)) cua thong cong dan ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((hanh trang) OR (canh tranh)) cua thong cong dan ((toan ban) or (van ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((hanh trang) OR (canh tranh)) cua thong cong dan ((toan ban) or (van ban))*.