AutoSuggestion in Solr is not returning the results.

I am working on AutoSuggeston functionality when i serach for a perticular term example "test" then i am getting results but when i search with some other term "test book" or "book" autosugesstions return 0 results. Do i need to do changes in schema.xml in solr or solrconfig.xml? any suggestion on this scenario will be helpful