Where a search query uses more than one operator, the Libraries Australia system, by default, processes them in the order: AND, OR, NOT
However you can make the system apply a different processing order by using parentheses. The terms in parentheses are then processed first of all, giving you a different search result.
a search query: London or Paris vacation
- will by default search as: London OR (Paris AND vacation) - so Paris and vacation will be combined first and then records with the term London added into the result.
- but the same search query using parentheses around London or Paris: ie (London OR Paris) vacation - will search first for records with the term "London" and also for records with the term "Paris", then the system will select from the combined records all those which also contain the term " vacation".