Answer:
internal search
Explanation:
Internal search is a term referring to searches done within websites you have already used. That is, you already saw a specific group of information within a site, but a certain situation made you need to return to that information on the same site, so you will need to do an internal search. An example of this happened to the teacher exposed in the above question, who recalled the discount site she visited last year for her purchases, so she plans to start there to see if the site still carries previously purchased items.