Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
chua bang » chu bang, chua nang, chua xang
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, cong dong
than cao » toan cao, thai cao, than cap
chuc » thuc, chu, phuc

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 trang ((chua bang) or (chuc nang)) ((cong dan) or (huong dan)) than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trang ((chua bang) OR (chuc nang)) ((cong dan) OR (huong dan)) than cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trang ((chua bang) or (chuc nang)) ((cong dan) or (huong dan)) than cao*.