Yes, you’re absolutely right - sorry for not making myself clear. Why I’m doing it this way is because when I have e.g. an e-mail with a PDF attachment which contains a specific phrase I’m searching for, it does turn up in the search results, but I can’t find the occurrences without separately opening the attachment and redoing the search e.g. in Preview (see How to find search occurence in an e-mail attachment?). But maybe there’s an easier way I’m not seeing?