it is very simple. Just click CTRL-F. You will have an option in that window to display the options, if they aren't already displayed. There you just select next to within "workbook". You give in the term/phrase that you want to look for and then you hit find all. In the CTRL-F window, all terms will be displayed in one go (so it doesn't only find one at a time) then with the corresponding page/sheet and cell number.
Thank you! But when I click that nothing happens: I just hear a "click" noise!!!