LEFT(text, [numchars])
=SUMPRODUCT((Sheet1!C5:C14=2003)*(Sheet1!D5:D14="x")*(LEFT(Sheet1!F5:F14,2)="10"))
=SUMPRODUCT((MauNhapLieu!G5:G10000=2007)*(MauNhapLieu!H5:H10000="X"))
=SUMPRODUCT((MauNhapLieu!G5:G10000="2007")*(MauNhapLieu!H5:H10000="X"))