Perhaps you should try some spelling variations:
social interaction » social interactions, social integration
2.3 communication » 3.2 communication, de communication, 4 communication
developpement et » developpement des, developpement de, development east
a developpement » au developpement, de developpement, le developpement
ecology social » economy social, technology social, ecology sociology
et afrique » en afrique, l afrique
from 2.3 » from 2003, from 20, from 25
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: ecology social interaction effects from 2.3 communication costs a developpement et afrique.*.