Thanks for the help.
I made as your advice but I am still need to combine the data into single DSO. I transform the data from first DSO (Cost center, Controlling area and Location number) to target DSO (Cost center, Controlling area, Location number, country, region, city). For country, region and city I used read master data in transformation and its working fine in test. Anyhow, when I run the DTP only cost center, controlling area and location number are transferred and other fields empty.