Select one or more referring search engines and enter one or more terms a user entered on an external search engine to find this Web site. For each entry, select 'starts with', 'contains', 'contains word', 'ends with', or 'exactly matches'.
To remove added terms, select the term in the list and click the 'Remove' button.
Add a timeframe constraint. This could be the same as the experience timeframe, a start and end date, in the last number of specified days, or more than a specified number of days ago.