Perhaps you should try some spelling variations:
trade information » price information, private information, trade integration
information wages » information age, information wants, information war
technology trade » technology trends, technology transfer, technology transfers
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
wages race » wages trade, wage rate, wages case
l afrique » en afrique
costs 4 » costs _, costs a, costs 4.2

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 _ communication costs 4 developpement l afrique.*.