Is there setting to control whether Topic Replies are included (or weighted) in search results?

On 2 different servers with the same forum data,

When I use MySQL search, I get search results that display a result for each Reply in the Topic that contains the criteria.

When I use Elastic search, the search results displays only a single result (the Topic) on the Search Results Page even though the criteria might show up several times within the Topic.

Is the difference Elastic vs. MySQL, or is there a setting somewhere that controls whether criteria displays a search result for every instance found in a Topic?

 

"Content titles and body" is selected by default. In both systems.