Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.4 communications » 2.4 communication, 5.4 communication, 1.4 communication
technology trade » technology trends, technology transfer, technology transfers
trade insulation » trade regulation, grade inflation, trade innovation
insulation wages » insulation case, insulation layer, insulation e2
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
wages race » wages trade, wage rate, wages case
de afrique » de l'afrique, en afrique, l afrique
race 2.4 » race 1.4, race 6.4, price 2.4
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 insulation wages race 2.4 communications costs 4 developpement de afrique.*.