Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
nho chieu » ho chieu, nho hieu, theo chieu
trung cap » truong cao
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho chieu sach - thanh ((trung tam) or (trung cap)) nhung cong bai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho chieu sach - thanh ((trung tam) OR (trung cap)) nhung cong bai toan cao.
• Adding a wildcard symbol may retrieve word variants: nho chieu sach - thanh ((trung tam) or (trung cap)) nhung cong bai toan cao*.