Search results not generated even when contents are indexed

Background:
Search is configured on the MOSS Server and contents are indexed properly.
However no results are generated when user tried to find the data that exists on the site.

The users are using the URL http://sharepoint.domain.com/ to access the site at http://servername/

Cause:
Alternate Access Mapping (AAM) settings are not set properly.

Resolution:

1. Add http://sharepoint.domain.com/ URL in the default zone
2. Add http://servername/ in the intranet zone
3. Re-run the crawl

The results will be displayed to the users now.