Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hoc thieu » toc thieu, hoc hien
chinh can » chinh ca, chinh ban, chinh cau
cong hung » cong chung, cong huong, cong dung
can cong » cac cong, cao cong, van cong
hung dan » huong dan, dung dan, tung dan
dan van » dang van, doan van, dao van
van tai » von tai, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (hoc thieu)) sach - hanh chinh can cong hung dan van tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) sach - hanh chinh can cong hung dan van tai*.