The phrase "a similar difficulty" is correct and usable in written English.
You can use it when comparing a challenge or problem that is alike to another one previously mentioned.
Example: "Many students face a similar difficulty when trying to grasp complex mathematical concepts."
Alternatives: "a comparable challenge" or "an equivalent issue".
He denied there had been a similar difficulty here.
McDonough had a similar difficulty: "We advertised for a head of maths and struggled to recruit.
The Blacks had a similar difficulty selling a fruit with a name that no one can pronounce.
If a committee of Nobel Prize winners set out to apologize for the sins of science, they would face a similar difficulty, although on a more mundane level.
If it is replied that the concept of red and others like it are acquired when we are taught the word red in childhood, a similar difficulty arises.
It seems to be working: revenues this year will be around $60m.Decode faced a similar difficulty in bringing its new genetic test for type II diabetes to market.
The family of Tamerlan Tsarnaev, one of the two men accused of carrying out the Boston Marathon bombing attack in 2013, faced similar difficulty finding a place to bury his body after the attack.
Homogeneity may be a strength in supporting unidimensionality (in a single or multiple dimensions), but a group of very similar items may also lead to a set of items of similar difficulty [ 17, 18].
Ironically, the world now faces a similar economic difficulty as before Copenhagen in 2009, only the U.S. and China have switched positions.
In a similar fashion, difficulty of use of the PDA administration was also measured using a 10-point VAS.
15 While we do not believe this is an issue of ethics, 16 a similar clinical difficulty arises in interpreting meta-analysis if the analysis includes an insufficient number of trials, patients, and ultimately, events.
