Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thang cua » thong cua, hang cua, than cua
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (theo chu)) sach - hanh ((thang cua) or (tang cua)) nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo chu)) sach - hanh ((thang cua) OR (tang cua)) nhung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo chu)) sach - hanh ((thang cua) or (tang cua)) nhung cong dan van ban*.