Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
lan tranh » lanh tranh, luan tranh, can tranh
cua thong » cua thuong, cua khong, cua tong
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
doc hieu » toc thieu, hoc thieu, hoc hien
than cao » toan cao, thai cao, 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 trinh) or (lan tranh))) or (hanh trang)) cua thong cong bang than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((((hanh trinh) OR (lan tranh))) OR (hanh trang)) cua thong cong bang than cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((((hanh trinh) or (lan tranh))) or (hanh trang)) cua thong cong bang than cao*.