Perhaps you should try some spelling variations:
communications paths » communication paths, communications pt, communications water
south communications » mouth communications, month communication, truth communication
technology 2.1 » technology 2.2, technology 3.1, technology 1
selection 17.3 » selection 13.3, selection 1.3, selection 14.3
been developed » between developed, less developed, both developed
2.1 selection » 3.1 selection, 3.2 selection, 2 selection
trade south » trade routes
17.3 trade » 12.3 trade, 5.3 trade, 3.3 trade
paths been » paths between

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

• Adding a wildcard symbol may retrieve word variants: technology 2.1 selection 17.3 trade south communications paths been developed _ action.*.