Perhaps you should try some spelling variations:
transfer factors » transfer factor, transfer across, transfer functions
developpement de » developpement des, developpement durable
3 communication » 4 communication, de communication, data communication
factors case » factors cause, factor case, factors age
de afrique » de l'afrique, en afrique, l afrique
case case » base case, case based, use case
case 3 » case 1, case 2

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

• Adding a wildcard symbol may retrieve word variants: technology transfer factors case case 3 communication efforts _ developpement de afrique.*.