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HTML

              
                <section id="tien_ich">
  <div class="container-fluid  bg-dark text-white">
    <div class="row noi_dung_tien_ich">
      <div class="col-sm-12">
        <h3 class="text-center">Tiện Ích</h3>
        <p class="text-center">Mình luôn muốn mang lại niềm vui cho các bạn học lập trình.</p>
      </div>
    </div>
    <div class="container">
      <div class="row  justify-content-center">
        <div class="col-sm-12 col-lg-4">
          <div class="tien_ich_item">
            <h3 class="p-4 text-primary icon_tien_ich"><i class="fa fa-map-marker icon"></i></h3>
            <h4>Làm Việc Mọi Lúc</h4>
            <p>Aenean tortor est, vulputate quis leo in, vehicula rhoncus lacus. Praesent aliquam in tellus eu.</p><a
              href="http://www.niemvuilaptrinh.com/" target="_blank">Tìm Hiểu Thêm</a>
          </div>
        </div>
        <div class="col-sm-12 col-lg-4">
          <div class="tien_ich_item">
            <h3 class="p-4 text-primary icon_tien_ich"><i class="fas fa-clock"></i></h3>
            <h4>Hỗ Trợ Mọi Lúc</h4>
            <p>Aenean tortor est, vulputate quis leo in, vehicula rhoncus lacus. Praesent aliquam in tellus eu.</p><a
              href="http://www.niemvuilaptrinh.com/" target="_blank">Tìm Hiểu Thêm</a>
          </div>
        </div>
        <div class="col-sm-12 col-lg-4">
          <div class="tien_ich_item">
            <h3 class="p-4 text-primary icon_tien_ich"><i class="fa fa-list-alt icon"></i></h3>
            <h4>Có Thể Chỉnh Sửa</h4>
            <p>Aenean tortor est, vulputate quis leo in, vehicula rhoncus lacus. Praesent aliquam in tellus eu.</p><a
              href="http://www.niemvuilaptrinh.com/" target="_blank">Tìm Hiểu Thêm</a>
          </div>
        </div>
      </div>
      <div class="row mt-md-4 pb-4">
        <div class="col-sm-12 col-lg-4">
          <div class="tien_ich_item">
            <h3 class="p-4 text-primary icon_tien_ich"><i class="fa fa-leaf icon"></i></h3>
            <h4>Chuyên Nghiệp</h4>
            <p>Aenean tortor est, vulputate quis leo in, vehicula rhoncus lacus. Praesent aliquam in tellus eu.</p><a
              href="http://www.niemvuilaptrinh.com/" target="_blank">Tìm Hiểu Thêm</a>
          </div>
        </div>

        <div class="col-sm-12 col-lg-4">
          <div class="tien_ich_item">
            <h3 class="p-4 text-primary icon_tien_ich"><i class="fa fa-plane icon"></i></h3>
            <h4>Giao Hàng Nhanh</h4>
            <p>Aenean tortor est, vulputate quis leo in, vehicula rhoncus lacus. Praesent aliquam in tellus eu.</p><a
              href="http://www.niemvuilaptrinh.com/" target="_blank">Tìm Hiểu Thêm</a>
          </div>
        </div>

        <div class="col-sm-12 col-lg-4">
          <div class="tien_ich_item">
            <h3 class="p-4 text-primary icon_tien_ich"><i class="fa fa-phone icon"></i></h3>
            <h4>Đặt Hàng Qua Điện Thoại</h4>
            <p>Aenean tortor est, vulputate quis leo in, vehicula rhoncus lacus. Praesent aliquam in tellus eu.</p><a
              href="http://www.niemvuilaptrinh.com/" target="_blank">Tìm Hiểu Thêm</a>
          </div>
        </div>
      </div>
    </div>
  </div>
  </div>
</section>
              
            
!

CSS

              
                section#tien_ich .noi_dung_tien_ich{
    padding: 2rem 0rem;
}

section#tien_ich .tien_ich_item{
    margin-right: 1.5rem;
    color:#000;
    background-color:#FFF;
    text-align: center;
    padding-bottom:2rem;
}
section#tien_ich .icon_tien_ich{
    font-size:4rem;
}
@media (max-width: 991.98px) { 
    section#tien_ich .tien_ich_item{
        margin-top:1rem;
    }
 }
              
            
!

JS

              
                
              
            
!
999px

Console