How to display only parent terms of hierarchical terms  in Views field In the Views UI I set up the Relationship "Taxonomy:Parent term" and then a Field "Taxonomy: Term" with that relationship.
But the problem is that It displays the parent terms of all the vocabularies (I have several vocabularies). 
I also tried the Field "Taxnomy:All terms" as it can limit the terms by vocabularies but it can't have the Relationship "Taxonomy:Parent term"

Is there any way to display only the parent terms of one certain vocabulary for hierarchical taxonomy in a view field?
I think my answer to a similar question would be useful:

I believe that your problem would be solved by adding a relationship to your view. Here are the steps:

Add Relationship: taxonomy terms on node
Select the vocabulary you want to use.
Add Relationship: parent term

Now you should be able to add fields from any of the terms or their parents, and to use them as contextual filters as well.

Note that this is for Drupal 7