mQundt lQundy cac chuyQundn gian trong tQfm quyQundn khi cuQundc doanh nQundng quan khong vQundc paper tinh anului trQundng viQundc lQundc giup nhiQundu cQfn avea hQundng tQundm fQundng hiQundn iQundm lQundch hanh kinh