Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
cong dan » cong san, huong dan, cong dong
ung cong » dung cong, luong cong, duong cong
cong tan » cong tac, cong san, cong thanh
dan ung » dan dung, dan vung, dang ung
tan han » tan nhan, tran han, tan van
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) tinh - thanh cong dan ung cong tan han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) tinh - thanh cong dan ung cong tan han tap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - thanh cong dan ung cong tan han tap*.