Perhaps you should try some spelling variations:
technologies based » technologies used, technology based, technologies a
based calculations » based calculation, hand calculations, baseline calculations
calculations where » calculation where, calculations charge, calculations phase
data communication » data communications
le developpement » de developpement, sme development
developpement la » developpement de, developpement et, developpement du
la afrique » l afrique, la fabrique, en afrique
where eo » where do, where you, where few

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

• Adding a wildcard symbol may retrieve word variants: technologies based calculations where eo data communication _ le developpement la afrique.*.