Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
cong toan » cong tan, cong tuan, cong doan
cong hoan » cong hoa, dong hoa, cong san
nhanh cay » nhanh ha, nhanh bac, nhanh va
cong cam » cong cac, cong nam, cong ca
cong cau » cong cu, cong chuc, thong cau

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 - thanh ((cong cam) OR (cong cau)) nhung ((cong toan) or (cong hoan)) nhanh cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh ((cong cam) OR (cong cau)) nhung ((cong toan) OR (cong hoan)) nhanh cay.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - thanh ((cong cam) OR (cong cau)) nhung ((cong toan) or (cong hoan)) nhanh cay".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh ((cong cam) OR (cong cau)) nhung ((cong toan) or (cong hoan)) nhanh cay*.