Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
cua nhung » va nhung
anh tang » anh dang, anh nang, anh sang
anh bang » anh hoang, anh quang, tinh bang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 - ((anh tang) or (anh bang)) cua nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((anh tang) OR (anh bang)) cua nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((anh tang) or (anh bang)) cua nhung cong dan toan cao*.