The phrase "seems difficult for" is correct and usable in written English.
For example, you can use it in a sentence like this: "Learning a new language seems difficult for many people."
An admission of this kind is, it seems, difficult for an audience to take seriously.
Still, it seems difficult for him to muster the same passion in talking about "Spider-Man 2" that he has for "Seabiscuit".
But now it does seems difficult for him to back down without losing face.
It's a market that seems difficult for Dell to compete in considering its own financial issues.
Conversely, it seems difficult for listeners to report impressions of strength and powerfulness for sounds using onomatopoeic representations.
For writing, students know and do only guided writing until 9th standard level, so it seems difficult for them to perform free writing at this level.
It would seem difficult for the government to change that policy.
At first glance it would seem difficult for such intimate works to carry heavy arguments.
But with so few patients available for clinical trials, it has seemed difficult for TKT to show this, Mr. Renaud said.
Letting go didn't seem difficult for Brown, who was as dominant in football as Jordan was in basketball.
Gay ubiquity began to make it seem difficult for homophobes to travel anywhere interesting without encountering their bugbear.
