How to get a nursing course job quickly in abroad specially in america??

You will need to have your qualifications verified, whatever country you go to work in. A good place to start is to contact the professional nursing bodies in the country you are going to. In the USA, you should also contact the State, as standards are often regulated locally.

Also, for USA:
http://canberra.usembassy.gov/education/...

The NCLEX exam is offered in many countries outside of the USA, through Pearsons testing centres.

Once you are registered, you can start your work visa paperwork and contact agencies:

http://www.adevia.com/usa-nursing-jobs.s...
http://www.adevia.com/nursing-us.html...
This company interviews in the UK, for example, as well as advice on visas and exams.

Good luck!