Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trang xay » trong xay, trang xa, trang va
doi hien » doi dien, doi bien, don hien
doi kien » doi dien, doi bien, don kien
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tuan ban » tuan bang, toan ban, luan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi hien) OR (doi kien)) lang - hanh trang xay dung ((cong tan) OR (cong san)) tuan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi hien) OR (doi kien)) lang - hanh trang xay dung ((cong tan) or (cong san)) tuan ban~".
• Adding a wildcard symbol may retrieve word variants: ((doi hien) OR (doi kien)) lang - hanh trang xay dung ((cong tan) or (cong san)) tuan ban*.