Within search boxes:

• Search terms are automatically joined by AND
  e.g. income tax finds income AND tax
• Truncation is automatic
  e.g. account finds account, accounts, accounting, accountants, etc.
• Use / for OR
  e.g. accounting / auditing
• Use ! for NOT
  e.g. patents ! trademarks
• Use " " to search for a phrase
  e.g. "income tax"
• Use >, <, >=, <= for greater or less than
  e.g. >= 1999 finds dates from 1999 onwards
• Use : to search a range
  e.g. 1999:2003, example:sample
• More help is available.