Be sure to use Caps for AND, OR, NOT when searching.
AND - searches for books and articles containing both terms. Example: baseball AND Japan
OR - searches for one of the words. Example: British OR English
NOT - exclude a term. Example: NOT Wales
Parenthetical notes () - excellent for OR or NOT searches. Like a math equation, the database will do this part first.
Example: baseball AND (girls OR women)
Quotation Marks ""- Links words together in the search. Works best for phrases or proper names.
Example: "great britain"
Example: "major league"
Warning: You might exclude results. "Great Britain" will not include instances where authors simply say Britain.
Asterisk * - Allows you to search several word endings at once, without using OR repeatedly.
Example: Brit* will cover Brit, Brits, British, Britain, Britannia
Warning: You may get unexpected results. Brit* will also yield Brittany, Britons, and Britches.
Many Databases have extra hidden search commands that only work in their database. These are extremely useful BUT differ between databases, so consult the directions for each database before using these commands.
Proximity searching is especially important for newspaper databases. Instead of AND use NEAR# or N# (depending on the database) so your keywords are in the same news story, not in unrelated stories/columns. 10 to 20 words of proximity is a good bet.
Please note that many databases works differently, so you need to read the about page. For example: