Certain searches are not permitted at sanet and I believe rightly so. Without delving into the exact reason, lets consider these characters create additional headache for webmaster, admins and all concerned - its a problem of technology vs. usability in the real world.
To bypass these, you need a search engine manipulator which will let you configure and help users search for "illegal" characters - just like google or in a smaller scale sharepoint ([Login to see the link]).
Difficult Solution 1
For SPS and other linux based search engines, you need to spend a lot (think millions) and redirect to search sanet.
Difficult Solution 2
Some sites also do mirroring of sanet. They are unreliable and often host unwanted stuff that may pop up to pop you.
Google already does it. Just go to google and point at sanet.
Your query should look similar to
This is just an example and you can modify the query to suit your purpose.