My Google AdSense application didnt accept by google

my application was not accepted by the google. they give me following reason. My site is www.searchhowtos.com. i have no adult content on my site and no copied content because i used copyscape for my content. Please help me

Hello Varun Kumar,
Thank you for your interest in Google AdSense. Unfortunately, after
reviewing your application, we’re unable to accept you into Google
AdSense at this time.
We did not approve your application for the reasons listed below.
Issues:
– Unacceptable site content:cool::D

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