I have made a blog, but even I cant search and find it on the yahoo or Google , Why is it ?

Answer 1

How long has it been since you created the blog? It takes about 4 months for a new web site to appear on the search engines. And then only the engines can find the blog, meaning they have to find a link somewhere that will let them to your blog.

So you need to get some of your friends to link to your site - the more the better. And then give it 4 months minimum for them to find it.