I'm a permanent resident I want to know if I am slowed to go back to my country for 1 or 2 months and come back to the us

Agian, if you got your residency based on asylum, you should not travel to that country. You can otherwise travel anywhere as long as the duration is less than 180 days and you have no intention of abandoning your residency in the USA. 

Yes, you may remain outside the United States for a month or two as a lawful permanent resident. As a lawful permanent resident, you are expected to spend more of your time in the United States than out of the country.