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Option Explicit
Sub xxx()
Dim MaNgay
Dim phieuSo
Dim i, j
MaNgay = Sheet1.Range("B8:C16")
ReDim phieuSo(1 To UBound(MaNgay) - 1, 1 To 1)
For i = 2 To UBound(MaNgay)
If MaNgay(i, 1) <> MaNgay(i - 1, 1) Or MaNgay(i, 2) <> MaNgay(i - 1, 2) Then...