How can i delete all previous search items on yahoo search bar?

Please follow this path. Tools> internet options> content > auto complete> clear forms. To stop the generation of history in the search bar, uncheck the box of forms. It will solve ur problem. Happy searching now.

This works if you have Internet Explorer as your browser. The record of search history which appears in the search box on Yahoo and Google pages is actually a feature controlled by your browser. Click Tools at the top of your screen,a menu will drop down,click on Internet Options, then click on the Content tab. Under Personal information, click on the AutoComplete box. On the AutoComplete Settings window click the Clear Forms box to delete your current history, or you can uncheck the Forms box to permanently stop the generation of the search history. To clear searches on Yahoo Toolbar,click the pencil icon beside the search box,a menu will drop down,click Clear Recent Searches.If you want to stop saving recent searches,click Toolbar Options and uncheck "Enable Search History",or check "Auto-clear Search History when quitting IE" to clear history when you close your Internet connection. If you just want to clear searches on Yahoo Home Page or any other Yahoo page, double click the search box, this will make a menu drop down with your searches, put your cursor on what you want to delete to highlight it, hit the delete button on your keyboard. If you want to delete everything just hold the delete button down until everything is deleted.