Click “Search engine” on the left side of the screen. Select “Manage search engines and site search” under Google to edit your default search engines. Scroll to the “Search engines ...
From this same area, you can edit the search engines by clicking "Manage Search Engines and Site Search." Here, you can edit and remove the provided search engines and create your own custom site ...
Open the ‘three-dot menu’ in Chrome and navigate to Settings. Click on Search Engine in the left-hand menu. Go to Manage search engines and site search. Select the Add option next to Site Search.