Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
south communications » mouth communications, month communication, truth communication
technology change » technological change, technological changes
change relations » exchange relations, change relationship, changing relations
port development » export development, airport development, forest development
development case » development china
relations 3.1 » relations 2.1, relations 1, relations _
race south » rice south, trade south, cape south
costs port » costs part, costs export, costs short
case line » base line, case like, case list
3.1 race » 3.1 rasse, 3.1 rater, 3.1 role

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

• Adding a wildcard symbol may retrieve word variants: technology change relations 3.1 race south communications costs port development case line.*.