Facebook ranked as the top search term in March across all three major search engines, according to a new report from Hitwise. Overall, Facebook related terms accounted for eight searches across the three top 10 lists. Yahoo related terms accounted for six spots while MySpace terms accounted for four searches across the search engines. Other search terms that were among the top 10 searches for all three search engines include YouTube, Facebook login, craigslist, and Yahoo Mail.