Records are cataloged into categories which are clustered by folder names. Automatic Fuzzy AND Automatic Fuzzy AND, but Sub-searching can be just as powerful. In Power Search, can specify domain or type of document or subject. Can combine limits. Also stems allowing most plurals and common endings.
Initial capitals cause phrase search.
Separate words by commas to form different phrase groupings. As a folder category, yes. In Power Search, limit by major Romanized languages. Yes, on Search Options page. Yes, in Power Search and on Publication Names search.