Is there a way to include value section of custom fields in a search?

Ive tried several plugins

https://guff.szub.net/2006/04/21/search-custom-fields/

and

https://www.don-benjamin.co.uk/wordpress/projects/foss/wp-plugins/wordpress-custom-search-plugin-01-beta/

I dont want a seperate search box, id just like to have it included in the regular search box im already using?