I think I might be misunderstanding this question. But I read it as "search current page", and the answer is:
Confluence's search is built for finding pages, not content within a page. So even if you did this, the result would not be anything more than a link back to the page you were on.
To search the current page for something, try CTRL-F - most browsers will pop a text search for you.
This is exactly what we advise users to do (8000 employees on Confluence) when we have a page where 'find on page' is relevant. We might use the Note (or similar) Macro to help 'pop' that advice to ensure casual visitors to the page see it.
It's probably too late for the OP, but if you with to include a search option alternative to CTRL+F (or Command+F on the Mac), add a LIVESEARCH macro to your page. In the options, select, "Restrict to label(s)" and choose a unique label that is specific to the current page (don't forget to add that label to the page).
I usually break up Confluence pages into sections (with child pages), but use the LIVESEARCH macro to search the current page plus all it's child pages. I'll add a unique label so that the search results are restricted to only the relevant pages.
Two vulnerabilities have been published for Confluence Server and Data Center recently: March 20, 2019 CVE-2019-3395 / CVE-2019-3396 April 17, 2019 CVE-2019-3398 The goal of this article is...
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