Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » hanh trinh, canh tinh, anh trinh
nhung song » nhung cong, nhung bong, nhung chong
hoc chieu » hoc thieu, ho chieu, hoc hien
song van » hoang van, trong van, duong van
van phan » van phong, van thanh, luan phan

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 - ((canh trinh) OR (canh tranh)) va nhung song van phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((canh trinh) OR (canh tranh)) va nhung song van phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((canh trinh) OR (canh tranh)) va nhung song van phan tu*.