Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
trade information » price information, private information, trade integration
information wages » information age, information wants, information war
technology trade » technology trends, technology transfer, technology transfers
e developpement » de developpement, le developpement, et developpement
des afrique » en afrique, de l'afrique
wages race » wages trade, wage rate, wages case
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 _ communications costs e developpement des afrique.*.