How can I troubleshoot enqueue in general and loading Google fonts specifically?

by

It works for me. Please try it out.Thanks

    function tf_add_google_fonts() {wp_enqueue_style( 'tf-google-fonts', 'http://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,700italic,400,700,300', false ); 
}

add_action( 'wp_enqueue_scripts', 'tf_add_google_fonts' );