Looking on the internet deeply has found these results:

an advanced is the most popular phrase on the web.

a advanced 12,310,000 results on the web	an advanced 143,800,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	He leaves in the morning for an advanced flying school. I've never seen such an advanced form of treatment before. You and Elliot in an advanced state of foreplay. The rest of the press corps got an advanced copy. The goal of the experiment seems to have been to create an advanced Human. KLEBER: Some say they were once an advanced civilisation. Only an advanced technological society could have built that object out there. Logic dictates that given their high level of technical development they're an advanced culture.

a advanced

12,310,000 results on the web

an advanced

143,800,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

He leaves in the morning for an advanced flying school.
I've never seen such an advanced form of treatment before.
You and Elliot in an advanced state of foreplay.
The rest of the press corps got an advanced copy.
The goal of the experiment seems to have been to create an advanced Human.
KLEBER: Some say they were once an advanced civilisation.
Only an advanced technological society could have built that object out there.
Logic dictates that given their high level of technical development they're an advanced culture.