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

• Search for Kenya to find all series that contain Kenya.
• Search for Kenya or Mombasa to find all series that contain either Kenya or Mombasa indicators.
• Search for cargo and volume to find all series that contain both cargo and volume indicators.
• Search for (Kenya or Mombasa) "cargo traffic" to find all series that contain either Kenya or Mombasa indicators or the phrase "cargo traffic".