What are the reason why chest xray result is blurry?

Image? or Report?: Are you referring to the image or to the report? If the image is blurry, it means that they obtained the images improperly - either using too much current or not enough - for your size and body composition (large individuals need "harder" X-rays to prevent scatter). If the problem is that the Radiology report is non-specific, then that is different. X-ray is not always best test to give diagnosis