orders = env['sale.order']
sale_orders = env['sale.order'].search([('state', '=', 'done'), ('invoice_status', '=', 'invoiced'), ('create_date', '>=', '05/01/2019 00:00:00')])
for so in sale_orders:
    lines = so.order_line.filtered(lambda l: l.product_uom_qty != l.qty_invoiced and l.invoice_status == 'invoiced')
    if lines:
        orders += so
orders.action_unlock()