Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
south communications » mouth communications, month communication, truth communication
development policies » development policy, development projects
over development » power development, river development, order development
technology race » technology rate, technology role, technology rich
race relations » trade relations
relations 2.1 » relations 3.1, relations 1, relations _
costs over » costs other, contests over
did south » die south, bind south, old south
2.1 did » 2.1 die, 4.1 did, 2.1 david

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

• Adding a wildcard symbol may retrieve word variants: technology race relations 2.1 did south communications costs over development policies a.*.