"more specific with" is correct and usable in written English.
You can use it when you want to emphasize the need to become more precise or give more details. For example: "Can you please be more specific with your description of the problem?".
Be more specific with directions to your employees.
Mr. Galvin said that Mr. Osgood had not been more specific with him either.
Mr Silver gets much more specific (with charts and figures, of course).
"I have to be a little bit more specific with where I throw the baseball.
Third, make the road map's simultaneous steps by Israel and the Palestinian Authority even more specific, with timetables and public monitoring.
growing inequality". The meeting will be Francis's first chance to be more specific with Americans about how he feels their country affects that inequality.
Indeed, that genre has become so overdone that it's become even more specific, with journalists exercising their thesauruses over articles about why they're leaving New York for Los Angeles.
Sanders met in Washington last week with racial justice activists who called for him to get more specific with his proposals for community and criminal justice reform, even as the senator introduced new legislation to phase out private prisons.
I think our technology is much harder to make, but we believe it's much more specific, with less off-target effects," said Peter Glazer, a Yale University geneticist and the co-author of the new study.
Some designers were even more specific with their sporty adaptions — as in the case of the young British designer Lou Dalton, who created this high-fashion take on a baseball shirt ($399; openingceremony.us).us
So while advertising technology might not be paying for the online experience, the advertising that it's fuelling most certainly does, as advertising technology enables us to be a lot more specific with who we put advertising in front of and when.
