Sub Tach_1_SheetThanhNhieuSheet()
Dim sh As Worksheet, Ws As Worksheet
Dim SoSheet As Integer, i As Long, Lr As Long
Dim tTime As Double
' Dim Rng As Range
' Dim Arr()
Const SoDong = 9000
Application.ScreenUpdating = False
Application.DisplayAlerts = False
tTime = Timer
Set Ws = Sheets("Sheet1")
Lr = Ws.Cells(Rows.Count, 1).End(xlUp).Row
For i = 2 To Lr Step SoDong
' Arr = Ws.Cells(i, 1).Resize(SoDong, 15).Value
SoSheet = SoSheet + 1
Set sh = Worksheets.Add
sh.Name = "Sheet_" & SoSheet
sh.Cells(1, 1) = sh.Name
Ws.Range("A1:O1").Copy sh.Range("A2")
' sh.Range("A3").Resize(SoDong, 15).Value = Arr ' chay hêt 79,533203125s
' Ws.Cells(i, 1).Resize(SoDong, 15).Copy sh.Range("A3") ' chay hêt 10,6171875s
sh.Range("A3").Resize(SoDong, 15).Value = Ws.Cells(i, 1).Resize(SoDong, 15).Value ' chay hêt 69,126953125 s
Next i
Debug.Print Timer - tTime
Application.ScreenUpdating = True
Application.DisplayAlerts = True
MsgBox "Done"
End Sub