The phrase "certain measures" is correct and usable in written English.
For example, you could use it in a sentence such as: "The government has taken certain measures to ensure the safety of the citizens."
Certain measures clearly make sense.
But certain measures may help.
Certain measures are taken, but we are never told why".
This article was amended on 12 March 2015 to convert certain measures from miles into kilometres.
But certain measures are expected to help keep costs from spiraling.
By certain measures, the United States' economy hasn't looked healthier in years.
"Bad times require certain measures, but we hope it is temporary".
Many helicopter companies adopted certain measures on their own after Sept. 11, Mr. Renz said.
And to prevent that, the authorities concerned introduced certain measures, which I considered proper.
Some health plans also complain that certain measures, such as customer satisfaction, are hard to evaluate.
In both the US and Europe certain measures are taken to counter this development.
