How Search results in RH2019 show H2 in a topic?

Search results show only topic title that includes the keyword. I need to show Heading2 in the same page that matches the search without adding it as sub-node.

For example, a topic called Posts and includes "Add files" in the same topic page as heading two. When searching by "Add files", I got the main topic title "Posts". Is there a way to to make search shows Heading two even if it's not a separate topic?