How to get node title using this query on template?
You shouldn't do queries like like that. You should use EntityQuery. See https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Entity%21Query%21QueryInterface.php/function/QueryInterface%3A%3Acondition/8.8.x and EntityFieldQuery to search Content Type for text and select matching Nodes
EntityQuery will return the nids. Then use the node storage's loadMultiple to get the node themselves. Typically something like Drupal::entityTypeManager()-&gt;getStorage('node')-&gt;loadMultiple($nids)
I would expect the Node title would be gotten in your loop with {{ oneItem.title }}. 
If that's not working I suggest installing and enabling the devel module, and sticking {{ dump(filters) }} in your custom template to investigate the structure you're getting