Looking for full time

I am on a student visa and I am looking for a job that will help me convert to a working permit or visa to extend my.
I went to yolo and saw some multiple job offers that says "Visa support". What does that specifically mean? Does it mean the employer will sponsor a working visa? Is it a specified visa? Im looking for an employer that will offer a humanities visa. How or where do I begin my search?
Im on 日常会話 level. I can speak english with a bachelor's degree.