There are a few search result page layout choices you can choose from the theme.

  1. On search result page navigate to [SITE NAME] – Customize link on admin toolbar
  2. Go to Bluchic Theme – Search page settings tab
  3. Check all necessary settings for your preference
  4. Click Publish on top to publish your changes (Note: Make sure it’s not Draft or Schedule)

Make sure to regenerate your thumbnail after you setup the Featured Image size.

Below is the settings of demo site for your reference:

Divi ChicServe Search page settings