i. AND - Shows results where both terms on either side of the 'AND' operator are present. 'AND' must be in upper case. For example search term - delhi AND metro result - It will return records in which 'delhi' as well as 'metro' both are present.
ii. OR - Shows results where either term (or both terms) is present. 'OR' must be in upper case. For example search term - delhi OR metro result - It will return records in which either 'delhi' or 'metro' or both are present
A proximity search looks for terms that are within a specific distance from one another. For example, search term - 'delhi metro'~10 result - It will search for records where 'delhi' and 'metro' are found within 10 words of each other
You can search phrases using double quotes. for e.g. 'delhi metro' result - It will return records where 'delhi metro' phrase is found.