do you know this movie?

Question

a man gose to brazill with his son this man is an engenear (a person who builds big structured like bridges and dams) he gose there to build a damn on the amazone river a tribe of natives see his son at the edge of the jungle and take him for there own son
and this man spends the next 4 or 5 years trying to find his son when he finds his son the tribe is taken buy slave traders who make the women work in a hore-house the man and his son free the women and the rest of the tribe and the man see his son is better off with the tribe and so he lets him go live with the tribe

Answer 1

"The Emerald Forest"
http://www.imdb.com/title/tt0089087/