Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trang » hanh trang, banh trang, thanh trang
doc chieu » doc hieu, doi chieu, toc thieu
dang cong » dung cong
cong ban » cong bang, cong san, cong tan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc chieu sach - ((canh trang) OR (canh tranh)) va dang cong ban ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc chieu sach - ((canh trang) OR (canh tranh)) va dang cong ban ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc chieu sach - ((canh trang) OR (canh tranh)) va dang cong ban ((than cau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: doc chieu sach - ((canh trang) OR (canh tranh)) va dang cong ban ((than cau) or (toan cau))*.