Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.3 communications » 2.3 communication, 4.3 communication, 1.3 communication
trade information » price information, private information, trade integration
information wages » information age, information wants, information war
technology trade » technology trends, technology transfer, technology transfers
developpement du » developpement de, developpement des, developpement et
e developpement » de developpement, le developpement, et developpement
wages race » wages trade, wage rate, wages case
du afrique » en afrique, l afrique, de l'afrique
race 2.3 » race 8.3, france 2.3, space 2.3
costs e » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology trade information wages race 2.3 communications costs e developpement du afrique.*.