Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
development central » development general, development centre, development cultural
3.3 communications » 3.1 communications, 3.3 communication, 2.3 communication
port development » export development, airport development, forest development
risk relations » risk regulations, milk relations, risk reductions
relations 4 » relations _, relations a, relations 3
polity 3.3 » policy 3.3, policy 3.1, policy 3.2
costs port » costs part, costs export, costs short
4 polity » 4 policy, _ polity, 4 politik

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

• Adding a wildcard symbol may retrieve word variants: technology risk relations 4 polity 3.3 communications costs port development central labor.*.