The phrase "a complex scheme of" is correct and usable in written English.
It can be used when describing a detailed or intricate plan, system, or arrangement involving multiple components or factors.
Example: "The researchers developed a complex scheme of experiments to test their hypothesis under various conditions."
Alternatives: "a complicated framework of" or "an intricate plan of".
Much of that money was taken through a complex scheme of bogus invoices and dummy corporations even as Mr. Whitacre was secretly cooperating with the Government investigation.
It was the first of several warning signs about Mr. Lanham, whom investigators have accused of stealing $3.6 million from the city through marked-up billings using a complex scheme of contractors and subcontractors, including I.B.M. and Verizon.
A medieval master sculptor, for example, received the program for a complex scheme of church sculpture from theological advisers, and Renaissance contracts for sculpture were often extremely specified and detailed.
A 49-year-old man wanted for five years on federal charges of credit card fraud was arrested last Wednesday and charged with stealing more than $175,000 in a complex scheme of identity theft and money laundering, the Queens district attorney's office said yesterday.
A court, however, is unlikely to adopt a complex scheme of no-fault insurance or to impose a different insurance scheme even though these more radical transformations of social institutions would provide higher overall welfare.
The middle level contains a complex scheme of frescoes illustrating the Life of Christ on the right side and the Life of Moses on the left side.
The Treasury is forming a committee of lawyers and accountants to oversee a complex scheme to hand £775m of Royal Bank of Scotland's cash to rival high street lenders.
Earlier, Young described to prosecutors a complex scheme to take hundreds of thousands of dollars from Rachel Bunnyy" Mellon, a banking heiress, and Fred Baron, a Texas millionaire who has since died, and route the money to look after Hunter and the child.
There she was to be sentenced by Judge John Sedwick, of the U.S. District Court, for carrying out a complex scheme to defraud the governments of Alaska and the United States.
Six people and six Belize firms were accused in a federal indictment of a complex scheme to launder money.
After months of wondering what was holding up their closing, they recently discovered that they are among the victims of a complex scheme to defraud a federally insured mortgage program intended to promote homeownership in poor neighborhoods.
