Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
thieu anh » thien anh, chieu xanh, thien danh
chinh ban » chinh bao, chinh can, chinh luan
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
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 thieu anh - hanh ((chinh ban) OR (chinh ngan)) dung cong dan ((khan cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu anh - hanh ((chinh ban) OR (chinh ngan)) dung cong dan ((khan cap) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu anh - hanh ((chinh ban) OR (chinh ngan)) dung cong dan ((khan cap) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu anh - hanh ((chinh ban) OR (chinh ngan)) dung cong dan ((khan cap) or (thanh lap))*.