Examples:-

bowl "+burr elm" in the Search box: the result shows every burr elm bowl AND anything made with burr elm.

+bowl "+burr elm" in the Search box: the result gives all bowls made with burr elm - but no other bowls - and no other objects.

Spalted oak in the Search box - result shows everything which includes "spalted" PLUS everything which includes "oak" - search is not case sensitive.

"spalted oak" in the Search box - results in everything which includes "spalted oak".

"goncalo alves" in the Search box - results in all items containing this wood name.