In my website i used dnn core search engine. this search engine showing result for some pages which are included in menu. but for some pages search engine not showing result. These pages are in menu. But these page's page name have register tag. for eg PMP®. there are many pages page name having register tag. so how to show these pages in search. search engine is not able to find those pages. when i try to find pages having register tag in their name it shows me no result. how to fix this problem. please help me its very urgent.

I have used below register tag and search tag

<%@ Register TagPrefix="dnn" TagName="SEARCH" Src="~/Admin/Skins/Search.ascx" %>

<dnn:SEARCH ID="Search1" runat="server" showweb="false" showsite="false"/>