"specifically familiar with" is an acceptable phrase in written English.
You can use it when you want to emphasize that someone is particularly knowledgeable about something. For example, "The consultant was specifically familiar with the procedures for this project."
He emphasized that he was not specifically familiar with the Founder Institute.
While not specifically familiar with F#, he observed that F#'s support for Language Integrated Query (LINQ) and lambda expressions is a big deal.
You probably weren't specifically familiar with the name "Richard Kind" before reading this, but you've seen him in -- or maybe loved him in -- something or other.
As far as the other budget cuts, Sullivan does not have a problem with an overall decrease in spending, although she is not specifically familiar with the programs Trump would be cutting and how it could impact students.
Specifically, a source familiar with the report told ABC the agency's failure rate was "in the ballpark" of 80percentt.
We laugh through the tears specifically because we are familiar with Shannon ― we know her mannerisms, her sensibilities, the glee she has brought us for years.
There's something very beautiful about that that I'm familiar with specifically because I grew up in Memphis and I was involved in something called the Memphis Children's Theater.
(Parts of the exchange in quotation marks were recalled specifically by participants or people familiar with the meeting. Other comments are paraphrased).
Staff lawyers for Mr. Leahy and Mr. Grassley are working on draft language that would make clear that the change was a one-time exception, although it would not name Mr. Mueller specifically, according to an official familiar with the deliberations.
In addition, they had been involved in HIV research, but were less familiar with PMTCT specifically.
There are specifically autobiographical tales here, and readers familiar with Gordon's work will recognize certain themes.
