Perhaps you should try some spelling variations:
technology interaction » technology integration, technology international, technology introduction
leur developpement » le developpement, deux developpements, de developpement
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
developpement de » developpement des, developpement durable
wage trade » wages trade, wage rate, jade trade
costs leur » costs clear
de afrique » de l'afrique, en afrique, l afrique
trade 2.7 » trade 2.2, trade 2.1, trade 4.7

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

• Adding a wildcard symbol may retrieve word variants: technology interaction _ wage trade 2.7 communication costs leur developpement de afrique.*.