phQundc chuyQundn nhiQundu tQfm nhien phQundi biQundt chQundi gian hiQundn nQundng doanh tinh mQundt vao thQundc khac cQfn vcdot mQfnh giup giQundi cQundng lQundnh loQundi khong khi phQundm xac chiQundn tieu rQundng mQundc