If there are a lot of search results that appear under a certain category and not all of them appear in the search dropdown, you may choose to look through all of them by using the advanced search. The Content search section allows you to search for a specific content in all conversations or specific messages in this conversation. Search [given string] in this conversation appears only when the user has opened a conversation.
To view the full list of search results, click the Show more text that appears at the bottom of any category that contains more search results than what appears in the window. This will take you to the full list of search results for that category.
If you’d like to search through the other categories while in an advanced search, simply select any of the category tabs at the top of the search box.