Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
hoc chieu » hoc thieu, ho chieu, hoc hien
hang cong » dang cong, hang nong, bang cong
chinh ta » chinh tai, chinh va, chinh tri
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh chinh ta ((nhung cong) OR (hang cong)) san toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh chinh ta ((nhung cong) OR (hang cong)) san toan cao*.