Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
hang cau » hang dau, nhung cau, nang cao
cong va » dong va, cong ha, cong tac
va dung » van dung, va duong, vat dung
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - thanh cong va dung cong san ((hang cau) OR (hang ca))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh cong va dung cong san ((hang cau) OR (hang ca))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh cong va dung cong san ((hang cau) OR (hang ca))*.