Query with like and or with PHP variable

Question

I have a form with two inputs one type text and one type date. I am trying to make a query where the result should be filtered either by name field or by birth date field or by two together. It turns out that the query works not only with the name field or only with the date field.If searching for the two fields works, but brings all the data based on what was typed in the two fields. I would like the query to filter through one of the two fields as well. Below is my function that performs the query.

public function findPacient($nome, $dataNasc)
    {
        $connection = new FirebirdConnection();

        $this->nomePaciente = $nome;
        $this->dataNascimento = $dataNasc;

        $sql = "SELECT REGISTRO_PRONTUARIO,NOME,DATA_NASCIMENTO,DOCUMENTO,TELEFONE FROM PRONTUARIO WHERE NOME LIKE '%".$this->nomePaciente."%' OR DATA_NASCIMENTO LIKE '%".$this->dataNascimento."%'";

        $data = $connection->conn->query($sql);

        $result = $data->fetchAll(PDO::FETCH_ASSOC);

        return $result;
    }

This is the file where I am instantiating my class. I am formatting the date to be the same as the format of the database but it did not help.

<?php

require '../../vendor/autoload.php';

use Classes\Pacient\Pacient;

$nomePaciente = strtoupper($_POST['paciente']);
$dataNascimento = date('d.m.Y', strtotime($_POST['dtNasc']));


$pacient = new Pacient();

echo '<pre>';
print_r($pacient->findPacient($nomePaciente, $dataNascimento));