The part of the sentence "three principles of" is correct and usable in written English.
You can use it to list three elements of a set of principles. For example, "The foundation of this system is based on three principles of efficiency, accuracy, and consistency."
Q. Talk more about failure. A. I go back to the three principles of risk management.
Mamta's three principles of making a perfect curry are: Be generous with your spices.
The problem is that these three principles of fairness are at war.
From his experiences there and at Europe's great cathedrals, he has derived three principles of church design.
The system is called trika ("triad"), because it recognizes the three principles of Shiva, Shakti, and the individual soul.
In fact, Mr. Putin listed "pragmatism" as the second of three principles of Russian foreign policy in a speech last year.
In it he outlined his three principles of successful composition: line, notan (Japanese concept of light and shade, or mass), and colour.
The result of his response was the Three Principles of the People (Sanmin Zhuyi nationalism, democracy, and socialism the prototype of which came to take shape by 1903.
"The three principles of dignity, wisdom and expediency are mere slogans on the country's foreign policy agenda," the English-language newspaper Iran Daily quoted him as saying, criticizing the way the president was approaching foreign policy.
So let us insist that all three principles of a democracy be upheld: counting all the votes, following the rule of law and assuring that voters have a real choice.
Sun Yat-sen, the first President of the Republic of China, had laid the groundwork for it a couple of decades earlier, in his manifesto "The Three Principles of the People".
