I knew it was by adding something like &as_qdr=y9 tag but is this incorrect or no longer working ? http://www.google.com/search?hl=en&q=site:geoseo.com&as_qdr=y9&btnG=Search
Hahaha, i found the answer do not search with site: only search the domain name alone like here http://www.google.com/search?hl=en&q=geoseo.com&as_qdr=y9&btnG=Search