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
va thong » va thuong, va phuong, he thong
cong van » cong vang, song van, cong tan
cong san » cong tac
quan tam » quan am, quan nam, quan tay
quan tai » quan tri, quang tri, quan li

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 thong ((cong van) or (cong san)) ((quan tam) OR (quan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh trang va thong ((cong van) OR (cong san)) ((quan tam) OR (quan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh trang va thong ((cong van) or (cong san)) ((quan tam) OR (quan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trang va thong ((cong van) or (cong san)) ((quan tam) OR (quan tai))*.