Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
chinh ban » chinh bao, chinh can, chinh ngan
dung cong » dung trong
khoan cam » khoa cam, khoan va, phan cam
thanh hai » thanh phan, thanh hoa, thanh san
ban dung » van dung, dan dung, tan dung
cong dan » cong san, cong tan, huong dan
khan cap » khan ap, than cap, phan cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh chinh ban dung cong dan ((((khan cap) OR (khoan cam))) or (thanh hai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh chinh ban dung cong dan ((((khan cap) OR (khoan cam))) OR (thanh hai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh chinh ban dung cong dan ((((khan cap) OR (khoan cam))) or (thanh hai))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh chinh ban dung cong dan ((((khan cap) OR (khoan cam))) or (thanh hai))*.