Google auto-suggestion element is not finding

I am trying to get the 4th auto-suggestion from the google search field. Running the program returns 'no element found error'. Can you please help.

Note: I can find my xpath  element when inputting in the search field.

Here is the code

driver.manage().window().maximize();

driver.get("http://www.google.com");

driver.findElement(By.name("q")).sendKeys("coro");

System.out.println(driver.findElement(By.xpath("//form[@id=\"tsf\"]/div[2]/div[1]/div[3]/div[2]/ul/li[4]/div/div[2]/div/span/b")).getText());