Perhaps you should try some spelling variations:
transfer sectoral » transfer factor, transfer factors, transfer social
developpement en » developpement et, developpement des, developpement de
sectoral status » sectoral strategy, structural status, sectoral studies
2 communication » 3 communication, 4 communication, 1 communication
4 developpement » de developpement, le developpement, et developpement
status trade » states trade, states traded, state trade
trade 2 » trade _, trade a, trade 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 transfer sectoral status trade 2 communication costs 4 developpement en afrique.*.