In order to change search engine yahoo to google at chrome browser you need to follow following steps:-
Step 1:- Open chrome browser and find the 3 vertical dot in the top right corner of the browser.
Step 2:- After clicking three dot vertical button a long dialog box opens, click on “setting“.
Step 3:– In settings find and click on ‘Search Engine’ options at left side of the browser. 
Step 4:- Change yahoo to google and save it. That’s it. Done . 
Now as you Search anything from chrome browser, Keyword search will be through google search engine.
