Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » thong cong, hang cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
khan cap » khan ap, than cap, khoan cam
khoa cam » khoan cam, khoa kham, khoa ma

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 tung cua ((nhung cong) or (dung cong)) dan ((khan cap) or (khoa cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh tung cua ((nhung cong) OR (dung cong)) dan ((khan cap) OR (khoa cam)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh tung cua ((nhung cong) or (dung cong)) dan ((khan cap) or (khoa cam))*.