No, there isn't an advanced search here. But, you could use google to help searching the forum
Go to: http://www.google.com/advanced_search?hl=en
put in key search words,
use site or domain: Arduino Forum
or in a google search box put key words site:Arduino Forum
For example, search "__stepper driver *site:http://arduino.cc/forum*__" brings up hits only for the forum. You can also narrow the search to individual sections by adding to the link i.e. "stepper driver site:http://arduino.cc/forum/index.php/board,11.0.html" (for the Networking, Protocols... Section)