I only want to get the title of subsites that contains characters as inputbox

I want to get the title of subsites from users input so for Ex if the user types Hello in my box then it should filter my titles by that input and only get that title and not all titles like my code does know

     var queryUrl = appweburl + "/_api/SP.AppContextSite(@target)/web/webs?$select=Title,Url,WebTemplate&$filter=WebTemplate ne 'APP' & substring('" + query + "', Title)&@target='" + hostweburl + "'";