Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
integration wages » integration wage, integration wege, integration wie
technology trade » technology trends, technology transfer, technology transfers
developpement en » developpement et, developpement des, developpement de
e developpement » de developpement, le developpement, et developpement
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 integration wages race _ communications costs e developpement en afrique.*.