How can i print a dictionary list in a listbox from tkinter

I am developing an application to search in a spreadsheet the open fees of some clients, save it in a dictionary and print it in the graphical interface. The code itself works perfectly, however, when the list gets too big at the end, the rest of the content is cut off. Can you tell me a way to solve it?

from tkinter import *
import openpyxl

root = Tk()

def hono_aberto():
    newWindow = Toplevel()
    newWindow.title("Output")
    newWindow.geometry("400x350+375+50")

    # Opens the spreadsheet and obtains the status of the last payment.

    wb = openpyxl.load_workbook('C:/temp/cobranca.xlsx')
    sheet = wb['Sheet1']

    lastCol = sheet.max_column
    # latestMonth = sheet.cell(row=1, column=lastCol).value

    # Checks the payment status of each customer.

    unpaidMembers = {}
    clients = []
    months = []
    emails = []
    for r in range(2, sheet.max_row + 1):
        for c in range(3, lastCol + 1):
            payment = sheet.cell(row=r, column=c).value
            if payment != 'ok':
                client = sheet.cell(row=r, column=1).value
                email = sheet.cell(row=r, column=2).value
                month = sheet.cell(row=1, column=c).value
                clients.append(client)
                months.append(month)
                emails.append(email)
                unpaidMembers[client] = email
                print('Line:', r, 'Column:', c, 'Client:', client, 'Email:', email, 'Month:', month)


    #--- LABELS ---#
    l_label1 = Label(newWindow, text="Client", font='-weight bold')
    l_label1.grid(row=1, column=1)
    l_label2 = Label(newWindow, text="Competence", font='-weight bold')
    l_label2.grid(row=1, column=2)
    l_label3 = Label(newWindow, text="E-mail", font='-weight bold')
    l_label3.grid(row=1, column=3)

    v_result1 = StringVar()
    l_cliente = Label(newWindow, textvariable=v_result1)
    l_cliente.grid(row=2, column=1)
    v_result2 = StringVar()
    l_mes = Label(newWindow, textvariable=v_result2)
    l_mes.grid(row=2, column=2)
    v_result3 = StringVar()
    l_email = Label(newWindow, textvariable=v_result3)
    l_email.grid(row=2, column=3)

    #--- OUTPUT ---#
    v_result1.set('\n'.join(clients))
    v_result2.set('\n'.join(months))
    v_result3.set('\n'.join(emails))




bt = Button(root, text='Check', command=hono_aberto)
bt.grid(row=1, column=1)

root.mainloop()

Here is a model of the spreadsheet used:https://prnt.sc/123sxpd