Perhaps you should try some spelling variations:
national language » natural language
de developpement » sme development
change national » change rational, change nationality, changing national
4 communication » 3 communication, 5.4 communication, de communication
developpement l » developpement il, developpement la, developpement de
language case » language course, language change, language usage
l afrique » en afrique
costs de » costs _, costs 4, costs a
case 4 » case 1, case 2, case 3
technological » technologies

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

• Adding a wildcard symbol may retrieve word variants: technological change national language case 4 communication costs de developpement l afrique.*.