I am unsure what an obyek is. However, irregardless, what I am understanding is that you have print shadow regions which are not showing detail when the background is properly exposed and printed.
Gary's recommendations will address the under-exposure problems that you experience. Beyond that, if you have inherently high contrast in the scene then the film would normally be pulled (over-exposed and under-developed). You would probably be best served in discussing this high contrast processing with your lab.