The 70’s were a very weird decade for Portuguese cinema. There was this rift between engaged filmmakers (after the Political coup of 74) and those who could not care less, and made their biggest masterpieces whilst many filmmakers were making propaganda films. Try for yourselves. The films are either paternalistic and militant or are extremely personal and alternative.
“Esplendor Selvagem” 1972 by António de Sousa: http://www.imdb.com/title/tt0068548/
“O Mal-Amado” 1974 by Fernando Matos Silva: http://www.imdb.com/title/tt0068901/
“Adeus, Até ao Meu Regresso” 1974 by António-Pedro Vasconcelos: http://www.imdb.com/title/tt0071102/
“Deus, Pátria, Autoridade” 1976 by Rui Simões: http://www.imdb.com/title/tt0072864/
“Nem Pássaro, nem Peixe” 1978 by Solveig Nordlund: http://www.imdb.com/title/tt0076444/
“Histórias Selvagens” 1978 by António Campos: http://www.imdb.com/title/tt0077685/
“Nós por cá Todos Bem” 1978 by Fernando Lopes: http://www.imdb.com/title/tt0078013/