This article gives you tips on how to use Search, and Find and Replace in Docs.
Search
To search for Docs, Sheets, or any other files, click the search field at the top of the homepage of Drive, or click 🔍icon on every page, or use ⌘+Shift+F or Ctrl+Shift+F keyboard shortcut.
Find and Replace
When there are multiple keywords that you want to change. You can use Find and Replace to locate the keywords within the Docs, and replace them at once.
Click More action/ ... icon - Find and Replace, or press ⌘+F or Ctrl+F.