Yes, "Eu leio jornal da manhã" it refer the newspaper belong to the morning (generally used as title of the newspaper).
"Eu leio jornal de manhã" it refer that the newspaper is reading of the morning.
"O sapato da menina" - The girl's shoes (the girl has a shoes).
"Eu vou de ônibus" - I go of bus.
How is my english? I missed something? Thanks.