The phrase "a set of core principles" is correct and usable in written English.
You can use it when referring to fundamental beliefs or guidelines that form the basis of a system, organization, or philosophy.
Example: "The organization operates on a set of core principles that guide its decision-making and actions."
Alternatives: "a collection of fundamental values" or "a group of essential tenets."
The US, he said, "has been clear that we stand for a set of core principles.
"Agreeing a set of core principles which leave staff in no doubt about what is appropriate will enable the organisation to identify breaches more readily.
The west's leading industrial countries have agreed a set of core principles designed to combat tax evasion and reveal the true owners of shadowy companies.
Now, throughout this period of unrest and upheaval across the region the United States has maintained a set of core principles which guide our approach.
He had a set of core principles, but he had a certain suppleness on practical politics, with evolving views on abortion, federal deficits, taxes, immigration and the size of government.
Only 3% fell into the category of "self-governance", in which everyone is guided by a "set of core principles and values that inspire everyone to align around a company's mission".The study found evidence that such differences matter.
The prime minister will ask G8 leaders, including Barack Obama and Angela Merkel, to sign up to a new set of core principles on tax on the second and final day of the summit, which opens in Northern Ireland on Monday.
Without renouncing our commitment to those old interests, the president embraced a supplementary set of "core principles": supporting universal rights, encouraging political and economic reforms, opposing violence and oppression.
Mr Cameron is expected to ask leaders including US President Barack Obama and German Chancellor Angela Merkel to sign up to a new set of core principles on tax at the G8 summit at Loch Erne.
What we need is an overarching set of core principles that all Democratic candidates and elected officials espouse.
It was also a modest achievement to get the UK's overseas territories and crown dependencies to sign up to a set of core international principles on exchange of information – something that should have happened a long time ago.
