Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua tong » cua cong, cua dong, cua song
cua nong » cua cong, cuu nong, cua dong
cong tap » cuong tap, cong tac, cong tan
doan cau » toan cau, doan dau, doan cap
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: hoc chieu sach - hanh tinh ((cua tong) or (cua nong)) cong tap ((doan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh tinh ((cua tong) OR (cua nong)) cong tap ((doan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh tinh ((cua tong) or (cua nong)) cong tap ((doan cau) or (toan cao))*.