Perhaps you should try some spelling variations:
technology barriers » technologies barriers, technological barriers, methodology barriers
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
barriers section » barriers reduction, barriers location, barriers tensions
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
section wage » sector wage, section case, section based
rates 4.2 » rates 4.5
costs le » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology barriers section wage rates 4.2 communication costs le developpement en afrique.*.