Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong lang » cong luong, cong quang, cong ngang
cong vang » cong quang, cong ngang, cong san
doc hieu » toc thieu, hoc thieu, hoc hien
tinh cua » trinh cua, sinh cua, tinh chat
cua dong » chua dong, cua cong, cua dang
than cau » toan cau, phan cau, than cap

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 - hanh tinh cua dong ((cong lang) OR (cong vang)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tinh cua dong ((cong lang) OR (cong vang)) than cau".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh tinh cua dong ((cong lang) OR (cong vang)) than cau*.