'many riches' is correct and usable in written English.
You could use it to refer to a person's material wealth or abundance of blessings. For example, you could say, "His life was filled with many riches, both material and spiritual."
The magazine added: "While the business world's titans obsess over piling up as many riches as possible, Feeney is working double time to die broke".
Moyes is a competent coach and manager, but he has never before had the privilege of so many riches at a club, and Sunday was his first trophy at the top end of the sport.
A con artist, calling himself Count Fujiwara, hatches a devious plan that sees him working alongside pickpocket Sook-hee to steal the many riches of beautiful heiress Lady Hideko.
In 1994, she published "The Chinese Siamese Cat," a children's book, illustrated by Gretchen Schields, in which the fictional Sagwa discovers her own identity and the world's many riches amid the mysterious opulene of Imperial China.
There are so many riches here that each visitor is likely to come away haunted by different items, including, perhaps, the cartoons, caricatures and sketches by the renowned Katsushika Hokusai.
He is again assured of returning to the Open next year – his goal at the start of the day was to get into the top 10 – while he also boosted his chances of earning many riches in the Race to Dubai, the European Tour's end-of-season bonus scheme.
There are many unexpected riches in this film.
Nowadays, ambition flowers in many spheres: riches or a seat in parliament, painting pictures or improving society.
Burmese dissident groups nurture a long-held hope that a regime change will bring greater prosperity to an impoverished population living amid remarkably fertile lands, abundant tropical hardwoods, ample natural gas reserves and many other riches.
I was once poverty level (I'm talking dumpster diving, food stamp, taking-bottles-back-to-the-store broke) and am now wealthier than I could have imagined as a child (and I use the word wealth to also include the many forms of riches I receive daily).
With their stock options no longer promising future riches, many Microsoft employees wanted their bosses to pay big dividends.
