Hi,
Could you please let me know which version of Kentico
CMS are you using?
Please make sure that smart search indexing is enabled (Site manager -> Settings -> section Web Site -> Enable smart search indexing).
Would it be possible to post some screenshots of index settings?
What do you mean with “I did not check the Document types in the CMS Sitemanager”?
Which web parts are you using to search and display search results?
Have you set the Transformation name property?
More information about Smart search module can be found in following section from Developer's guide:
Smart SearchBest regards,
Michal Legen