Sometimes want to remove items from the searches, so AND can be used more specifically. e.g. when searching for "Offals of Goats, Edible", the word "Goat" still survives the terms, and searching Goat and Brain doesn't produce much. Being able to search for "Brain" alone would help.
Sometimes want to remove items from the searches, so AND can be used more specifically. e.g. when searching for "Offals of Goats, Edible", the word "Goat" still survives the terms, and searching Goat and Brain doesn't produce much. Being able to search for "Brain" alone would help.