In addition to the "all"/"any" options, most search engines have the following features:
* Search engines search for every key word individually.
If you're looking for a phrase, you must surround it with quotation marks (for example: "North America").
* Most search engines discriminate between capital letters and lower case letters. If you type in capital letters, the engine will only search for matching words in capital letters. If you type in lower case letters, the engine will search for any matching words, whether they're capitalized or not.
For more information, refer to your search engine's "Help" section.
