Perhaps you should try some spelling variations:
22free ports » free port, free parts, three ports
23 great » 13 great, 23 get
23 green » 3 green
25 great » 5 great, 15 great, 3.5 great
13 green » 3 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) OR (free ports)) AND zones %((((((23 great) OR (23 green))) OR (25 great))) OR (((13 green) 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) OR (free ports)) and zones %((((((23 great) or (23 green))) or (25 great))) or (((13 green) or (3 great)))) britain %20 early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %((22free ports) OR (free ports)) and zones %((((((23 great) or (23 green))) or (25 great))) or (((13 green) or (3 great)))) britain %20 early works to 1800%22*.