What is the best way to search in multiple fields in django?

I have the following model in my models.py, and I want to search based on its three fields.

class Profile(models.Model):
    username = models.CharField(max_length=128, null=False, blank=False, unique=True)
    password = models.CharField(max_length=128, null=False, blank=False)
    name = models.CharField(max_length=50, null=True, blank=True)
    lastname = models.CharField(max_length=50, null=True, blank=True)
    parent = models.ForeignKey('self', null=True, blank=True, related_name='children', on_delete=models.CASCADE)

There are also three separate inputs for entering the text, one for name, one for last name, and one for username. The user should at least fill in one input, or if the input string was a part of main string, the main string should be returned.

enter image description here This is my API, but it does not return anything, and the result list is always empty.

def search_users(request):
    if request.method == 'GET':
            to_be_searched_username = request.GET.get("username", None)
            to_be_searched_name = request.GET.get("name", None)
            to_be_searched_lastname = request.GET.get("lastname", None)

            supervisor_username = request.headers['Authorization']
            supervisor = Profile.objects.get(username=supervisor_username)
            if not((to_be_searched_name or to_be_searched_lastname) or to_be_searched_username):
                return Response({"message": "Enter a search term"}, status=status.HTTP_204_NO_CONTENT)
                results = supervisor.children.filter(
                    username__icontains=to_be_searched_username and to_be_searched_username is not None
                    name__icontains=to_be_searched_name and to_be_searched_name is not None
                    lastname__icontains=to_be_searched_lastname and to_be_searched_lastname is not None
            return Response({'results': results}, status=status.HTTP_200_OK)
            return Response({"message": "خطا در دریافت اطلاعات"}, status=status.HTTP_400_BAD_REQUEST)

I will be grateful for any help or advice.

You can filter with:

def search_users(request):
    if request.method == 'GET':
        to_be_searched_username = request.GET.get('username')
        to_be_searched_name = request.GET.get('name')
        to_be_searched_lastname = request.GET.get('lastname')

        supervisor_username = request.headers['Authorization']
        supervisor = get_object_or_404(Profile, username=supervisor_username)
        if not (
            or to_be_searched_lastname
            or to_be_searched_username
            return Response(
                {"message": "Enter a search term"},
            results = supervisor.children.all()
            if to_be_searched_username:
                results = results.filter(
            if to_be_searched_name:
                results = results.filter(name__icontains=to_be_searched_name)
            if to_be_searched_lastname:
                result = result.filter(
        return Response({'results': results}, status=status.HTTP_200_OK)
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