Auto Suggest on Amazon Cloud Search

I am trying to use amazon cloudsearch to implement search functionality.

It uses set of key:value pair to represent a document. A suggester can be defined that will give auto complete suggestions based on the values of a particular key. It searched the given query as a prefix for the values of the key specified.

I have searched its documentation. I want to enable auto complete suggestions also from the middle of a value of a field. Can i enable this on amazon cloudsearch?