In SharePoint search query suggestion allows users to enter the search terms easily by appearing the suggestion words under the search box. SharePoint automatically create the suggestions depending on the previous search history. We can create query spelling suggestions manually by exporting the query suggestions file.
We can create query suggestions by creating the new text file and adding the query spellings one word per a line.
Save the text file as .txt with UTF-8 encoding format.
To import query suggestions file in SharePoint site Navigate to Search Administration page in SharePoint central Administration (Application Management -> Manage Service Applications -> Search Service Application) and click on “Query Suggestions” link in quick launch Queries and Results section.
In Query Suggestion Settings page, , Select “Show search suggestions” check box and Select “Language for suggestion phrases” section select Language as “English”. In Always suggest phrases section click on “Import from text file” link to upload the text file.
In “Import phrases for query suggestions” page, Text file with phrases section click on browse button to browse and add query suggestion text file created earlier, click on ok to save the settings.