Trying to find the name of a film?

what is the best way (website) where i can type in key words and the name of a film would come out? the movie is an older movie, a man falls in love with a woman that he meets on a bus. They go to Monte Carlo (i think) to get married and he creates a gambling system where he always wins. hes so obsessed with the money that he makes the woman weary of loving him. he eventually throws all the money away to be with her? has anyone heard of this film?