Open your Google Doc
Press Ctrl+H on Windows or Command+Shift+H on Mac
In the Find box, type the text you want to search for
In the Replace with box, type the new text
Click Find to locate each match
Click Replace to change one match at a time
Click Replace all to change every match in the document
Use Match case if you want to match capitalization exactly
Use Match using regular expressions if you want to search with patterns
Use Ignore diacritics if you want to match accented and unaccented characters
Close the Find and replace window when finished