Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, thai cao, than cap

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: ((doi chieu) OR (toc thieu)) tinh - hanh trung cua dung ((cong dan) OR (cong tan)) than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (toc thieu)) tinh - hanh trung cua dung ((cong dan) OR (cong tan)) than cao~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) tinh - hanh trung cua dung ((cong dan) OR (cong tan)) than cao*.