Snippet: WordPress Child theme CSS does not override Parent theme

In functions.php of the child theme try setting wp_enqueue_scripts as follows.

<?php 
function theme_enqueue_styles() { 
    wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );
    wp_enqueue_style( 'child-style', get_stylesheet_directory_uri() . '/style.css', array('parent-style') ); 
}
add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' ); 
?>