Phrase searching allows you to search for a phrase. Use quotation marks around the phrase in order to tie all the words together in the order they must appear in. For example, search for "skin cancer" or "the girl with the dragon tattoo."
Wildcard. A wildcard is a placeholder that can represent one or more characters in your keywords. Usually represented by a question mark. For example, searching for colo?r would return both color and colour.
Truncation. Truncation is a placeholder that can represent one or more characters at the end of your keywords. Usually represented by an asterisk. For example, searching for educat* would tell the database to look for all possible endings to that word. Results will include educate, educated, education, educational, or educator.
Proximity searches use operators to designate how closely, and in what order, you want the search terms to appear. Typically the proximity operators are composed of a letter (N or W) or word (NEAR) and a number (to specify the number of words appearing between your search terms). For example, curriculum N3 theories would search for curriculum within 3 words of theories, in any order.