Perhaps you should try some spelling variations:
thesis innovators » trends innovators, heroic innovators
1.4 communication » 5.4 communication, 1.1 communication, 1.3 communication
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
innovators age » innovators _, innovation age, innovators 3.1
de afrique » de l'afrique, en afrique, l afrique
age trade » age grade, wages trade, have trade
trade 1.4 » trader 1.4, trade 1.3, trade 1.3.4
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 thesis innovators age trade 1.4 communication costs 4 developpement de afrique.*.