Perhaps you should try some spelling variations:
"specified protocols ports" » "specific protocol ports", "specified protocols part", "specified protocols short"
"specific protocols ports" » "specific protocol ports", "specific proposals ports", "scientific protocols ports", "specific protocols part", "specific protocols short"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"specific protocols ports\") OR (\"specified protocols ports\"))".
• Removing quotes may allow a broader search: (( specific protocols ports ) OR ( specified protocols ports )).
• Adding a wildcard symbol may retrieve word variants: (("specific protocols ports") OR ("specified protocols ports"))*.