When searching for string values the target value must be enclosed by single quotes (for example, "Name=‘Brooke’"). The "like" operator is used for string pattern matching and you may use "*" or "_" wildcard characters in the string expression being sought where "*" will match any string of characters and "_" will match any single character. Also, the Criteria argument can only be used to search for a single value (or string pattern) within a single field; it does not support multicolumn or multivalue searches.