While using Search Query Suggestion REST API in SP2016 On-Premises, we are not getting expected results. e.g. searching for ‘data’ should show up ‘database tuning’, ‘database optimization’ but it does not, there are zero suggestions.
When searched for ‘database’ (the complete word) only search suggestion is ‘database’ i.e. the same word.
How to achieve the same using REST API endpoint used is
Please note that we have also updated Query suggestion enabled in SharePoint and imported few words as like
Database Performance Tuning Performance Testing Sample Suggestion