"north pole" retrieves documents in which the words north and pole appear next to each other, in that exact order.
north pole (without quotation marks) retrieves documents that contain both words north and pole, regardless of where the words appear in the document.
AND, OR, NOT
You may also use the following symbols in place of AND, OR, NOT:
+ (plus sign for AND) | (pipe sign for OR) - (minus sign for NOT)
lincoln AND douglas retrieves only documents that contain both lincoln and douglas.
lincoln OR douglas retrieves documents that contain either lincoln or douglas.
Wn terms must appear within n words in the specified order.
Nnterms must appear within n words of one another, in any order.
henry W1 thoreau retrieves documents that contain the phrases henry david thoreau or henry thoreau.
race N3 riot retrieves documents that contain the phrases race riot;race and riot in wartime LA; race, gender and riot;riot of 1921: race, reparations, and reconciliation; but also riot and the arms race.