I think you misunderstand what a google dork is.
A Google dork is a string that can be searched on google to find vulnerable pages. What you are explaining is just how to use Google's search functionality.
For example, say I have a vuln in phpbb 9.8.7 a google dork for it could simplly be
"Powered by phpBB 9.8.7"
or perhaps I know a specific file is often reused over many projects
inurl

ome-unique-file.php intitle:Vulnerable
Would be the google dork for some page that always has the word 'Vulnerable' in the title and is named some-unique-file.php
Google dorks are specific search strings to find vuln pages.
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For anyone who cares: allinanchor:, allintext:, allintitle:, allinurl:, cache:, define:, filetype:, id:, inanchor:, info:, intext:, intitle:, inurl:, link:, related:, site: is the complete list of (offically supported) search operators for the web search atleast. There are others like author: but they are bound to change and not included in google's offical list.
http://www.google.com/advanced_search is good to know about also.