Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
than man » than ma, thanh san, tran manh

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 (doc hieu)) xanh - anh tang cua dung cong san ((nhat ban) or (than man))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - anh tang cua dung cong san ((nhat ban) OR (than man)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - anh tang cua dung cong san ((nhat ban) or (than man))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - anh tang cua dung cong san ((nhat ban) or (than man))*.