Go to Home > Replace. Enter the word or phrase you want to replace in Find what. Enter your new text in Replace with. Choose Replace All to change all occurrences of the word or phrase. Or, select Find Next until you find the one you want to update, and then choose Replace. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.