'work exceedingly hard' is correct and usable in written English.
You can use it to emphasize the effort the subject is putting into a particular task. For example: "John worked exceedingly hard to get into the top university."
They will need to work exceedingly hard to re-educate consumers about having a more sustainable balance between promotion and standard prices".
Unlike most American agriculture, many of the dairy farms outside Waco are owned and run by young couples with children, who work exceedingly hard without a stupendous amount of government subsidy.
Once you have made agreements with a judge on what you are willing to do to get your children back or keep your children, work exceedingly hard to do everything that is required of you.
Both players worked exceedingly hard to get where they got; unlike most professional athletes today, they were not singled out at an early age and trained to be world-class competitors.
"Great intelligence, exceedingly hard work and enormous self-denial made Venture a wealthy man," Barbara Barnes wrote in a Wesleyan University graduate thesis.
Changing the system would either lead the candidates to concentrate more on national issues and national media markets, in effect excluding the smaller states from the political process, or turn them into purely regional candidates bent on whipping up local resentments.The abolitionists' case is not strengthened by the fact that scrapping the college would be exceedingly hard work.
Headhunters say that while it is easy to get British bankers to go and work elsewhere in the world, it is exceedingly hard to get people to move the other way.
Making all that work and winning the support of Afghanistan's neighbors -- including India, Iran, and Russia -- will be exceedingly hard.
He thumps, exceedingly hard.
Precisely measuring the success or failure of the drug war is exceedingly hard, experts say.
