Thanks for your help, I hope You don't give up too early
File: your_site\modules\mod_finder\helper.php is edited as it should be.
For testing, I renamed folder: "your_site\modules\mod_finder", and it give no any change, searching works badly as it works before. It seems like "your_site\modules\mod_finder\helper.php" is not corresponding with search module of my webpage.
I have cleaned cache, I did it in this way -> Administration Panel -> "Site" -> "Maintenence" -> "Clear Cache" -> check all checkboxes -> "Delete" button
If I choose "Components" -> "Search", I can see well gathered statistics . Maybe I'm using another search component then You? I have sj_news_quickstart_j25_v1.3
Thanks