When I use the app and search for a keyword, the results appear in a small window showing the word I searched for. However, when I click on one of the search results, I have to scroll manually and slowly to find the word myself, since it isn’t highlighted or automatically brought into view.

My suggestions would be either to make the small window larger so that more of the text is visible, or to have the app automatically scroll to (and highlight) the searched word when I click on a result. That way, I can easily spot it without having to search manually.