For quick searches, you can filter the entry list view. (Note: only the entry list can be filtered, not the tree or calendar views.) The filter searches only in the title/question of each entry.
Type in your search word or phrase and click ‘filter’ to display the entries whose titles contain your search term. For example, I can quickly locate all my weekly readings by filtering on ‘week:
Click ‘Clear to return to the full list of entries; you need to do this before you can filter the list again.