• Use & for AND (gold & copper)
• Use / for OR (gold / copper)
• Use ! for NOT (gold ! copper)

Special Characters:

• Use * to truncate (e.g. deposit* finds deposit, deposits, deposition, etc.)
•  Use >, <, >=, <= for greater of less than (e.g. <= 1999 finds dates earlier than 1999 inclusive)
•  Use : to search a range (e.g. 1999:2003)

Toggle buttons:

• Use between criteria to limit the search (AND, OR, NOT)