Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trong van » trong cac
duong va » duong van, dung va, luong va
khan cap » khan ap, than cap, khoan cam
tung va » trung va, tuong va, dung va

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