Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » hanh trinh, canh tinh, anh trinh
toan thang » toan thong, thanh thang, tran thanh
thang cong » thanh cong, thang long, thong cong
ho chieu » theo chieu, hoc thieu, mot chieu
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - ((canh trinh) or (canh tranh)) toan thang cong tan phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((canh trinh) OR (canh tranh)) toan thang cong tan phan lap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((canh trinh) or (canh tranh)) toan thang cong tan phan lap*.