Vertex AI -Agent Builder - Search - unable to idenify any elements from Data Source

[Amod]

For a POC, created a data set by importing structured JSON via S3 bucket. It was imported successfully without any issue. (below is sample json file). Image is modified for display purpose. It is process correctly as shown in below screenshot.  However in search typed any of data from below like FastFood, Male. it doesn't return data but shows "No results could be found. Try rephrasing the search query."

[Amod]

If anyone facing similar issue, i solved it by recreating the project and dataset again. I believe but not sure is at last step after you create a dataset. I didn't checked it earlier and checking this time might have solved the issue