For AND use &. e.g. red & green

For OR use /. e.g. red / green

For NOT use !. e.g. International ! Africa

To truncate use *. e.g. hous* (to find housing, house, houses, housed etc.)

Use >, <, = to search years. e.g. >1999

Use : between dates to search a range of dates, e.g. 1999 : 2003