The phrase "a more intractable problem" is correct and usable in written English.
It can be used when discussing issues or challenges that are difficult to manage or resolve, often in a more complex context.
Example: "The team has encountered a more intractable problem than we initially anticipated, requiring additional resources and time to address."
Alternatives: "a more stubborn issue" or "a more difficult challenge."
A more intractable problem is the music.
Oddly, this is a more intractable problem than transmission at birth.
A more intractable problem is the broadcast network, ABC, which Disney bought in 1995 and is still losing money.
Instead, they are designed to stem a more intractable problem: the temple's exploding population of stray cats.
The extent of agricultural waste could prove a more intractable problem than that of the many factories dumping effluent into China's rivers and lakes.
There was also a more intractable problem, in the basic conception of Meyer as a nobody, incapable even of getting the President's attention.
That's troubling for the immediate future of gun control, because if Manchin really believes the public has spoken, that would be a much more intractable problem then simply fighting some industry misinformation and winning a couple more votes.
Achieving humanistic management has thus turned out to be a much more intractable problem than most thought leaders expected it to be.
The army's successful dismantling of Marquetalia in 1964 inadvertently created a much more intractable problem, as the static self-defence groups under Tirofijo's leadership turned into mobile guerrilla forces.
Mr. Obama was less clear publicly on how he planned to address the issue of Pakistan, which many administration officials say will prove to be a far more intractable problem in the long term than Afghanistan.
The belt armor was a much more intractable problem; the 16-inch gun could penetrate 13.5 inches of plate, the thickest in an American battleship at the time, even at 25,000 yards.
