Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
chinh ca » chinh ta, chinh va, chinh tai
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
ca dung » cao dung, cap dung, cu dung

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: "doc hieu xanh - hanh chinh ca dung cong dan ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh chinh ca dung cong dan ((toan cau) OR (toan ban))*.