AND search provides a search result that contains all search words you type at a search box. For example, “Apple AND Computer” is the search result that contains both Apple and Computer. AND operator is optional, so the default operator is AND in Fess.
AND operator is written in capital letters, and is optional.
For multiple words, type the following query with AND operator at the search form:
"term 1" AND "term 2" AND "term 3"