"certain extent of" is a correct and usable phrase in written English.
You can use it to describe the degree to which something happens or is true. For example: "We can accept these changes to a certain extent, but some of them still need to be revised."
Norway's exports consisted mainly of wooden goods to Great Britain and, to a certain extent, of glass and iron products.
To a certain extent, of course, the Republicans are using their power to obstruct in the Senate because a Democratic President is in office.
The Valentine's Day exposé of Heartland is reminscent to a certain extent of the hacking of emails from the University of East Anglia's Climate Research Unit in 2009.
FWdK: I regard it as a failure, to a certain extent, of the present government to uphold all aspects of the agreements which we reached.
"It was hard to juggle the feelings of fascination and, to a certain extent, of the grotesque, though that's not the right word because it's too negative.
It's odd how Teddy Roosevelt's expression "bully pulpit" has outlasted the disappearance both of the widespread, or even marginal, use of the adjective "bully," and even, to a certain extent, of pulpits.
"I had this disease, and I still do to a certain extent, of not being able to take myself seriously, of being unwilling to advance myself," Ms. Mortimer said.
Photograph by George Frey/Bloomberg/Getty. It's odd how Teddy Roosevelt's expression "bully pulpit" has outlasted the disappearance both of the widespread, or even marginal, use of the adjective "bully," and even, to a certain extent, of pulpits.
Farming in emerging markets is riddled with market failures and does not react to price signals as other businesses do.This is true to a certain extent of farming in general.
Ignored by gentrification, the businesses of Brownsville are up against the repercussions of not only a weakened national economy but also, to a certain extent, of a retracted drug trade that however insidious kept money in the neighborhood in motion.
Putting a drama into other languages, he argued, was "not simply a matter of translating the meaning but also, to a certain extent, of re-creating the style and the images and ultimately adapting the entire form of expression to the structure and demands of the language into which one is translating".
