Can you help me to arrange some cards in a web page with Bootstrap 4?

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet">

<div class="container py-3">
  <div class="row">
    <div class="col-sm-12 col-md-4 col-lg-3 py-3">
      <div class="card text-white bg-primary h-100 rounded-0 shadow-sm">
        <div class="card-body">
          <h5 class="card-title">Primary card title</h5>
          <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
        </div>
      </div>
    </div>
    <div class="col-sm-12 col-md-8 col-lg-9">
      <div class="row">
        <div class="col-sm-6 col-lg-4  py-3">
          <div class="card text-white bg-primary rounded-0 shadow-sm">
            <div class="card-body">
              <h5 class="card-title">Primary card title</h5>
              <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            </div>
          </div>
        </div>
        <div class="col-sm-6 col-lg-4 py-3">
          <div class="card text-white bg-primary rounded-0 shadow-sm">
            <div class="card-body">
              <h5 class="card-title">Primary card title</h5>
              <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            </div>
          </div>
        </div>
        <div class="col-sm-6 col-lg-4 py-3">
          <div class="card text-white bg-primary rounded-0 shadow-sm">
            <div class="card-body">
              <h5 class="card-title">Primary card title</h5>
              <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            </div>
          </div>
        </div>
        <div class="col-sm-6 col-lg-4 py-3">
          <div class="card text-white bg-primary rounded-0 shadow-sm">
            <div class="card-body">
              <h5 class="card-title">Primary card title</h5>
              <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            </div>
          </div>
        </div>
        <div class="col-sm-6 col-lg-4 py-3">
          <div class="card text-white bg-primary rounded-0 shadow-sm">
            <div class="card-body">
              <h5 class="card-title">Primary card title</h5>
              <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            </div>
          </div>
        </div>
        <div class="col-sm-6 col-lg-4 py-3">
          <div class="card text-white bg-primary rounded-0 shadow-sm">
            <div class="card-body">
              <h5 class="card-title">Primary card title</h5>
              <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>