If you refer www.irf.net and watch Dr. Zakir Naik vedio DVDs then you will surely find out no contradictions in the holy book of Qur'an.

[7.179] And certainly We have created for hell many of the jinn and the men; they have hearts with which they do not understand, and they have eyes with which they do not see, and they have ears with which they do not hear; they are as cattle, nay, they are in worse errors; these are the heedless ones.

[2.2] This Book, there is no doubt in it, is a guide to those who guard (against evil).