Private Sub CommandButton1_Click()
Dim Rng As Range, Ce As Range
Dim iRow As Long, sRow As Long, st As Long, en As Long
On Error Resume Next
Set Rng = Range("[COLOR=darkred]Data[/COLOR]") ' tên của ô A1
sRow = Rng.Row
iRow = Rng.End(xlDown).Row
Set Rng = Rng.Offset(1, 0).Resize(iRow - sRow, 1)
For Each Ce In Rng
With Ce.Offset(0, 2)
.Value = Ce.Value
st = WorksheetFunction.Find(UCase(Trim(Left(Ce.Offset(0, 1), 1))) & ":", Ce)
en = WorksheetFunction.Find(Chr(10), Ce, st)
If en = 0 Then en = Len(Ce) - st
With .Characters(Start:=st, Length:=en - st).Font
.ColorIndex = 3 ' [COLOR=red]màu đỏ[/COLOR] '
.Bold = True ' [COLOR=red][B]đậm[/B][/COLOR] '
End With
End With
Next
End Sub