With predicting you have a global understanding of the text and you have determined that it may contain the information you are looking for. You have skimmed the text and already have a good overview of the global ideas in the text.
With the help of scanning you can now search for information on a specific topic. You are no longer interested in the broader picture, but are looking for a concrete answer. You know what you are looking for.
Search:
Start from your keywords about the information you are looking for and keep these words in mind as you scan. After skimming, you may already know which terms the text uses for this.
Use the find command to search for the terms on websites, in e-books or in PDFs. Press ctrl-f or cmd-f, type in the term and press enter. For a book: use the index at the end of the book.
Start with the sections of the text where you expect to find the information you need based on the predicting and skimming steps. Review the first and last paragraphs of that section for confirmation.
When you have found the information, it is time to really read it.