Looking for scrapebox expert

I have a scrapebox project where I need to search the web for a specific html string. For example, Lets say I want to search webpages for the string

<form method="post" action="http://www.twitter.com/api">

I need someone to guide me on the best and efficient way to do this

If interested please let me know your skype and how much you will charge

You can't. No public search engine will allow you to search for html strings, only content. There are paid engines that do this, you can google for such if you like.

You could search for your keywords and download pages as string and check each downloaded page contains that or not .... you need custom bot for that .