-# Search server: Full support for all types of boolean expressions.
-# It may be slow in some cases - for example 'ANY' or 'NOT "A"' queries.
+# Search server: Full support for all types of boolean expressions and ANY.
+# (Otherwise, only expressions with at least one term matched positively are allowed.)
+# It may be slow in some cases - for example `ANY' or `NOT "A"' queries.