@Turadg, thanks for your feedback! As you’ve noticed, Search and Project views are distinct in Asana – I’ll be sure to file your feedback that search views don’t feel as useful as the Project view with column headers. For your knowledge, we omit the custom field column header from Search views to simplify cross-project searches where Custom fields might conflict.
Does it make sense to create a separate Project called “Sprint”? In that case, rather than tagging a Task as “Sprint”, you can instead tether the Tasks to that project and have the customizable Project view you’re looking for.