Perhaps you should try some spelling variations:
chinh khung » chinh phuong, trinh khung, chinh khu
thieu sach » chieu sach, thien hach, hieu cach
khung dung » khong dung, nhung dung, phung dung
hoc thieu » toc thieu, hoc hien
sang than » cang thang, dang thanh, sang tao
san than » san thanh, ban than, van than

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 thieu sach - hanh chinh khung dung trong ((san than) OR (sang than)) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh chinh khung dung trong ((san than) or (sang than)) cau*.