Perhaps you should try some spelling variations:
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thiet anh » thien anh, thuyet anh, thien danh
chan dung » van dung, dan dung
can xung » can bang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh 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 thiet anh - hanh chinh ((can xung) or (chan dung)) cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet anh - hanh chinh ((can xung) OR (chan dung)) cong dan than cap.
• Adding a wildcard symbol may retrieve word variants: hoc thiet anh - hanh chinh ((can xung) or (chan dung)) cong dan than cap*.