How to delete browing history in the box 'Search/Bing' at the right top corner?

Hi:
There are more than ten(10) browing history, i.e. Bank of America, Boy and etc. popping up when I typed 'b' on search box at the right top corner of Search/Bing.

I want to delete those old and unneeded browsing history. I accessed Tools > Internet Option and clicked 'Browsing History' to delete, however there is still the same, .... more than ten browsing history I typed in the 'Search/Bing' box for the past years.

How to delete browing history in the box 'Search/Bing' at the right top corner of the screen?

Thanks for your help in advance.