Perhaps you should try some spelling variations:
calculations source » calculation source, calculations charge, calculations software
technologies based » technologies used, technology based, technologies a
based calculations » based calculation, hand calculations, baseline calculations
c2 developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
4 communication » 3 communication, 5.4 communication, de communication
communication r » communication 3, communication 1, communication 2
source does » source des, source codes, source de
does 4 » does _, does a, does e
r c2 » r c, _ c2, 2 c2

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

• Adding a wildcard symbol may retrieve word variants: technologies based calculations source does 4 communication r c2 developpement en afrique.*.