Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung huong » dung thuong, dung phuong, dong huong
doi chieu » doc hieu, doi chi, ho chieu
canh manh » lanh manh, cach mang, van manh
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - ((canh manh) or (canh tranh)) tin dung huong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((canh manh) OR (canh tranh)) tin dung huong dan phan cau*.