Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
nang cong » nang song, dang cong, hang cong
bang cong » dang cong, bang song, hang cong
lang van » dang van, tang van, hoang van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trinh luat ((nang cong) OR (bang cong)) lang van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh luat ((nang cong) or (bang cong)) lang van ban*.