As an interviewer I understand if candidates say "they wished to develop themselves in a different area or field" or "career opportunities at my previous employment were limited" or it may be as simple as "the hours of work did not suit my home life" or "the travel time involved was impacting on my home life".
The hours were difficult, or it wasn't the career you were after
Employers usually ask applicants their reasons for leaving a previous job. Potential employers may call the previous employer for a reference.
You might get a job offer over the phone.
I wasn't able to perform at my highest level of performace and felt like i wasn't going to move in the company.
did not feel like part of the team
I am looking for a more challenging position.
Depending on your state's rulings, it is possible if the reason for leaving this job is acceptable to the state and if you still had benefit time left on your previous unemployment benefits.
Honestly.
Educational reasons
First, have a previous job. Next, leave that job for some reason. Now, explain why you left your previous job to your prospective employer. It's simple. Be honest. It's what they want from you.
Honestly
They might consider that you would leave them for the same reason. It depends on the circumstances. If your last job involved long hours or a ridiculous commute, then they might consider it entirely reasonable.