Perhaps you should try some spelling variations:
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
technology trade » technology trends, technology transfer, technology transfers
integration have » integration how, integracion hacia, integration unter
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
have mode » have made, have more, have moved
mode 3.1 » model 3.1, modes 3.1, mode 3.13
costs de » 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 trade integration have mode 3.1 communication costs de developpement en afrique.*.