For the searching the current SDK documentation, I would install the SDK docs locally. The local docs use a different search that works better.

To download a single installer for both the User Guide and SDK Guide:
http://www.autodesk.com/softimage-documentation

Just the SDK:
http://images.autodesk.com/adsk/files/softimage-2013-sdk-doc0.zip

Local search results are much better than the online search: