can i request a visa to travel in autralia within 2months.I'm from vietnam but i'm studying in usa.?

i don't want to come back VietNam because i have to continue studying in U.S after 2 months holiday

Yes, you can

So you should contact the nearest Australian embassy or consulate in your place. The visa fee is 15 USD for tourists. For more information, please contact here : http://www.vietnam.embassy.gov.au/hnoivietnamese/Visaapply.html

Good luck and have a safe trip!

I would think your efforts would be better directed to the AU embassy, not here. I / we are not going to issue you a visa, the embassy might.