While setting up conditional emails with the Form Emails add-on, you create filters with complex criteria. Each condition in the conditional logic window can contain one or more criteria and you may use AND/OR operators to specify whether the criteria is optional or mandatory.

The Google Forms add-on lets you easily create advanced filters with multiple criteria. Here are some examples.
Equals - Answer exactly matches the specified textAny of - Specify a list of values (comma separated) and the answer should be one of these
valuesNone of - Answer should not equal to any item in the list (comma separated)Contains - Text is anywhere inside the answer fieldDoes not contain - Answer does not contain the specified textIs Empty - The answer is blankIs Not Empty - The answer contains at least one character (not blank)If you would like to check if an answer is among a list of possible values, use a single
Containscriterial instead of creating multiple criteria with theEqualsfilter.
Equal to == - Answer matches the specified numeric valueNot Equal to != - Answer doesn't match the numberGreater than - Answer is greater or equal to numberLess than - Answer is less or equal to numberIf you would like to check if an answer is between two numbers, create two conditions for the same field - greater than the lower limit and lower than the upper limit.