Big trouble in little namiquipa

I have been trying to research my mothers side of the family and can't find anymore info than I already know. Ok, my great grandfather's name. Was librado lorta. His whole name was librado lorta tena , but when he became a citizen , he was obligated to change "tena" to his middle name. He was born in namiquipa, chihuahua on 8-17-13. He had 2 older siblings : Salvador and Ana(Anita) . I have checked through all of ancestry and family search and can't find anything other than the 2 border crossing records from 1925 and 1932. He was crossed over by his 2 tias Maria Concepcion tena and Enriqueta tena ( Vargas was her married name) and i have nothing in them either. My grandfather died in 2006 before I got into the whole genealogy thing. But my grandmother ( his wife) is still alive and I talk to her almost every day. She says he never really knew his parents. " family legend" has it his parents nameswere "santana"(father). And "refugia" (mother). His mother died in child birth around 1916 and his father died of hypothermia around 1920. He was orphaned by the age of 7 and was out on his own. He and his sister Anita immigrated to the us in the 20s but I can only find records of him crossing. It's too weird. I need some tips on new place to search or just a new approach plan. Thanks, Lorenzo.