In the search engine list below, Search Engine Watch provides a guide to the major search engines of the web. Why are these considered to be "major" search engines? Because they are either well-known or well-used. For webmasters, the major search engines are the most important places to be listed, because they can potentially generate so much traffic.
This is just a spam post - it says, "in the search engine list below" and there is not engine list - they copied and posted this here and did not even get enough of it to make complete sense - I wish these spammers would just go away!
Because all other search engines are using of about 4 of major ones including Google,Yahoo,Bing,Ask And also you have not listed any search engine in your post