Is it true that since my husband is salvadorian there is a better chance for him to get his green card?
Hes in el salvador right now because he was arrested and then deported. When he was here in the U.S. he had a work permit. He was in the TPS program.
You husband will need a one or more waivers to be able to obtain his green card. If he is in El Salvador he will have to do consular processing and submit the waivers at the Embassy/Consulate. His prior deportation complicates his process. I would recommend that you consult with an immigration attorney regarding your husband's situation.
Criminal Defense Attorney
If he was arrested and deported he is now most likely inadmissible, which means if he re-enters without a waiver he could face up to 20 years in a federal prison and then be deported again. As the other attorneys have indicated he needs a good immigration lawyer.