Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong dan » cong tan, huong dan, cong dong
cong san » cong tac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - hanh hang ((cua dung) OR (cua dang)) ((cong dan) OR (cong san)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - hanh hang ((cua dung) OR (cua dang)) ((cong dan) or (cong san)) van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - hanh hang ((cua dung) OR (cua dang)) ((cong dan) or (cong san)) van ban*.