customize search result in wordpress

What shows in search results is not always controlled by search plugins. You probably need to adjust your theme. Create a child theme, copy search.php from the parent theme into the child theme, and wherever it calls for the_content() replace that with the_excerpt().

Some search plugins may modify this behavior, so you’ll have to do some trial and error, but you can start with out-of-the-box WP search to test and then try a variety of plugins.

If you have budget available, there are several paid search options that allow you to adjust relevancy and weighting of different items like the title, content, etc. Elastic, Swiftype, and others give you a lot more control over your search results without having to have coding knowledge or even adjust your theme – you pick what shows in the serps right in their UI.