You do not mention your SharePoint version, but for 2013:
Open Central Administration > Service Applications > Search Service Application
From the left hand side choose the Query Suggestions link. [..]
Enable the Show check box and choose the Import from text file option.
Create a text file like this, containing your suggestions:
Upload the text file and click OK
Now run the
Prepare query suggestionsjob
This answer is in great part based / borrowed from Jean Paul
For 2010, they are indeed created when typed in 6 times in the search box. But make sure that the search results webpart is configured to show them:
To configure query suggestions
- Verify that the user account that is performing this procedure is a site owner on the Search Center site.
- On the Search Center site home page, click Site Actions, and then click Edit page.
- On the Search Box Web Part menu, click Edit Web Part.
- Expand the Query Suggestions node.
- Make sure that the Show query suggestions box is selected. If you want to turn off query suggestions, clear the Show query suggestions check box.
- If required, change the following settings:
- Minimum prefix length: The number of letters the user must type before query suggestions are displayed.
- Suggestion delay (in milliseconds): The number of milliseconds to elapse before query suggestions are displayed.
- Number of suggestions to display: The number of query suggestions to display in the list.
- Click OK.
Also make sure that
Query Logging is enabled in the Search Service Application
The only other way is to add them by PowerShell I'm afraid.