Perhaps you should try some spelling variations:
chinh ban » chinh bao, chinh ngan, chinh luan
chinh can » chinh ca, chinh cau, chinh ngan
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
hien anh » hien hanh, thien anh, dien anh
cong dan » cong san, cong tan, huong dan
khan cap » khan ap, than cap, khoan cam

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