Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
theo chieu » theo tieu, ho chieu, thi chieu
tong cong » trong cong, cong cong, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » cho chu, chao chu, theo yeu
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap
va tong » va thong, va tuong, va trong

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) or (((theo chieu) or (theo chu)))) xanh - hanh trang va tong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (((theo chieu) OR (theo chu)))) xanh - hanh trang va tong cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (((theo chieu) or (theo chu)))) xanh - hanh trang va tong cong tan than cau*.