At this month’s Sydney Drupal meet up I did a presentation about Search in Drupal 8. In the video, I explain three ways you can create a search page, they are as follows.
Link: Presentation: Search in Drupal 8
The core Search module in Drupal 8 now allows you to create custom search pages. Learn how to create one in my latest tutorial at WebWash.
Link: How to Create a Search Page in Drupal 8