Perhaps you should try some spelling variations:
technology volume » technologies volume, seismology volume, technology evolution
volume inflation » volume ventilation, volume evaluation, core inflation
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
4 communication » 3 communication, 5.4 communication, de communication
rate based » state based, frame based, waste based
de afrique » de l'afrique, en afrique, l afrique
costs au » costs a, costs amy, costs _
based 4 » based 4.1, based 4.3, based na

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

• Adding a wildcard symbol may retrieve word variants: technology volume inflation rate based 4 communication costs au developpement de afrique.*.