When you are on a project and write what you are looking for in the search engine at the top left, search results are limited to items in that project.
You have the option of extending your search to all of your projects by clicking on the “Extend the search to the entire application” mention:
The system performs a search in all elements regardless of their nature:
At the end of your search, when you click on the desired result, the system lands you on the result highlighted by a blue box. You can then easily access the content of the element.