The phrase "are rather difficult for" is correct and usable in written English.
It can be used when discussing challenges or obstacles that someone may face in relation to a specific subject or task.
Example: "These mathematical problems are rather difficult for students who have not studied the material thoroughly."
Alternatives: "are quite challenging for" or "are somewhat tough for".
This will unfrortunately be rather difficult for longer programs, so it is not recommended.
However, it is rather difficult for the planners to attempt to design without engaging the urban climate scientists.
"If America wants to become a hegemonic power, it is rather difficult for other nations to prevent that," he wrote.
For instance, it's rather difficult for six friends to buy the exact amount of cocaine, in advance, that each of them wants to take that evening.
He has been travelling around among them, but his position has been rather difficult, for there has never been a metropolitan of the Syrian Jacobite Church in this part of the world before, and there is really no see for one.
"I'm not saying we won't send a grandmother to Washington, but it's rather difficult for a 71-year-old woman to effectively conduct a door-to-door campaign against a well-financed, formidably entrenched opponent".
Vincent Peyregne, the Wan-Ifra chief executive, said: "It is rather difficult for the United Kingdom to lecture Sri Lanka and others about their press freedom record, when its own actions result in such widespread international condemnation.
"It is rather difficult for the I.C.O. to now turn the clock back or indeed prove anything," Chris Pounder, a data protection expert with the training firm Amberhawk, was quoted as saying in The Telegraph.
However, despite these properties which have been achieved to a significant degree through molecular engineering of the liposome bilayers, a universal liposomal carrier has not yet been developed since it is rather difficult for the above properties to be simultaneously fulfilled.
