"attempt to rob" is a correct and usable phrase in written English.
You could use it in a sentence like: "The police thwarted the suspect's attempted to rob the local convenience store."
They pool their complementary resources in an audacious attempt to rob a mob-connected nightclub owner.
Footage has emerged of one man's failed attempt to rob a local store, after getting stuck in the roof.
She surmised that he wrapped it with electrical tape and used it in the attempt to rob the undercover officers.
A daily round of petty humiliations leads him to a desperate, bloody attempt to rob a jewelry store.
The witness, Ahmed Ressam, failed to tell the authorities about his attempt to rob a Montreal currency exchange in 1999.
Canada (2012) chronicles the experiences of a man whose life is shaped by his parents' bungled attempt to rob a bank during his youth.
Fleeing from the murder, Jackson attempted to rob a small market, and killed the owner, James B. Hall.
He said investigators believe that gunmen attempted to rob the men, and fired when they resisted.
— Note from a Pennsylvania man who allegedly attempted to rob a bank in an apparent bid to go to prison.
In 1967, at twenty-two, he attempted to rob a bank, in order to raise funds for the cause.
A man attempting to rob a Waffle House outside Atlanta, Ga., was shot and wounded by a customer early Monday.
