change text within the search box

Thank you for your question.

The text is generated by the Sydney theme that you are using on your site.

You can change it by either editing theme file searchform.php in the child theme or by translating the theme or using any of the following plugins.

https://wordpress.org/plugins/say-what/
https://wordpress.org/plugins/real-time-find-and-replace/

Best regards,

You are always welcome here 🙂