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 "Reserves", enclose the phrase in quotes.
Please refer to the following examples:

• Search for Liberia to find all series that contain Liberia.
• Search for Import OR Export to find all series that contain either Import or Export indicators.
• Search for Import AND GDP to find all series that contain both Import and GDP indicators.
• Search for (Import OR Export) "Reserves" to find all series that contain either Import or Export indicators or the phrase "Reserves".