Perhaps you should try some spelling variations:
22free ports » free ports, free port, free parts
23 great » 23 get
23 green » 3 green, 13 green
25 great » 5 great, 15 great, 3.5 great
13 great » 13 green
20 early » 10 early, 1820 early, 1720 early

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %22free ports AND zones %((((((23 great) OR (23 green))) OR (25 great))) OR (((13 great) OR (3 great)))) britain %20 early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22free ports and zones %((((((23 great) OR (23 green))) or (25 great))) or (((13 great) or (3 great)))) britain %20 early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %22free ports and zones %((((((23 great) OR (23 green))) or (25 great))) or (((13 great) or (3 great)))) britain %20 early works to 1800%22*.