Search string may contain the logical operators AND and OR and the operands () and "". AND searches for both words or phrases, while OR searches for one or the other. If the search string uses AND and OR at the same time, the AND operation takes priority, unless you enclose the OR operation in parentheses, as in (A or B) and C. To find an exact phrase, such as "population by age", enclose the phrase in quotes.
Please refer to the following examples:

• Search for Mauritius to find all series that contain Mauritius.
• Search for literacy or mortality to find all series that contain either literacy or mortality indicators.
• Search for maternal and mortality to find all series that contain both maternal and mortality indicators.
• Search for literacy or mortality "women and men" to find all series that contain either literacy or mortality indicators or the phrase "women and men".