Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
trang va » tran van, hang va
doan cau » toan cau, doan cap, doanh chau
doan dau » doan dieu, phan dau, doan va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh trang va hang ((cong tac) OR (cong ty)) ((doan cau) or (doan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trang va hang ((cong tac) OR (cong ty)) ((doan cau) OR (doan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh trang va hang ((cong tac) OR (cong ty)) ((doan cau) or (doan dau))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trang va hang ((cong tac) OR (cong ty)) ((doan cau) or (doan dau))*.