Perhaps you should try some spelling variations:
communication system » communication systems, telecommunication system, communication series
technologies cohort » technologies corporate, technologies authors, technologies co
cohort variation » color variation, country variation, about variation
la communication » data communication, data communications
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
variation der » variation des, variation bei, variation _
system le » systeme le, system lm, system late
does la » does lac, does law, does a

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

• Adding a wildcard symbol may retrieve word variants: technologies cohort variation der does la communication system le developpement en afrique.*.