What is the scope for Search API?

Hello, 
I am trying to request data using following API

/api/v2/search/export

But I am getting following response error:

{'error': 'Forbidden', 'description': 'You are missing the following required scopes: read' }

When creating OAuth I am using following scopes to request the data from APIs

"scope": "tickets: read tickets: write"

On successful authentication I get Access Token and using it I can request tickets data endpoint.

I have followed and implemented OAuth using this post Using OAuth. 

I am not sure if there is any other resources we can use in our scope and can request data. Any information on this would be very helpful.

Thanks.