With so little information it's extremely difficult for someone to help you. You created the LC images by classification? If so, then what was your dataset, which algorithm(s) you used, which software, what was the procedure and so on. If you downloaded a LC product then there no much to do.
I agree with Nikolaos Tziokas. If you did your own LULC classifications, you can try to repeat your analysis changing algorithm parameters to improve them. But, if you downloaded a LULC dataset, there is not much to do.