Hoặc công thức này:=+IFERROR(INDEX($C$3:$C$11,SMALL(IF($B$3:$B$11=$B15,ROW($B$3:$B$11)-2,10000),VALUE(TRIM(SUBSTITUTE(C$14,"Đơn giá",""))))),"")
=+IFERROR(INDEX($C$3:$C$11,SMALL((100^($B$3:$B$11<>$B15))*(ROW($B$3:$B$11)-2),COLUMN()-COLUMN($B15))),"")