www.wysiwygwebbuilder.com

hi

i want to know about "site search", that is full find article or document or texts or pages contexts ?

Please see the following:
WYSIWYG Web Builder has basic built-in 'search engine' functionality, so visitors can search for specific words within your website.
https://www.wysiwygwebbuilder.com/sitesearch.html
Note if you need something more then you will need to install a server side application.