
To use Google to search Twitter, you should restrict the search results by applying [site:twitter.com] command. This makes it possible to look for people who may be interested in what you are promoting:
* Target by occupation: intitle:”seo * on twitter” site:twitter.com
Let’s say you have a business that sells an awesome service to attorneys. A simple search on Twitter will turn up thousands of mentions of the word attorney, but many of them will be from people talking about this or that attorney or the need to hire or not hire one. That’s probably not very helpful for your purposes.
* Target by bio: intext:”bio * web designer” site:twitter.com
In some cases searching through the optional biographical information can be more helpful than the username or real name fields. Maybe you’re looking for a very specific term or some of the folks you are targeting only reference their profession in their bio.