You can exclude certain articles from search results. These articles will still appear in the table of contents, but will not be searchable.
What it looks like when an article is excluded from search
How to exclude an article from search
Click the article title
In the Admin area, click the title of the article to bring up the article preview and article properties.
Toggle the "Exclude from ScreenSteps search" setting
The Excluded from ScreenSteps search setting can be toggled from the article properties sidebar.