Return excerpt on Search

you will just do the the_excerpt(); in search loop

like this

Following is the code that goes in search.php

<?php if(have_posts()):while (have_posts()):the_post();?>
    <a href="https://wordpress.stackexchange.com/questions/214112/<?php the_permalink(); ?>">
       <h3 class="title-heading"><?php the_title(); ?></h3>
       <?php the_excerpt(); ?>          
    </a>    
<?php
    endwhile;
    else:"No matching result found";
    endif;
?>