Perhaps you should try some spelling variations:
interaction cost » interaction counts, interaction about, interaction how
up communication » amp communication, de communication, 3 communication
technologies co » technologies _, technologies 4, technologies 2
co interaction » eco interaction, 2 interaction, 3 interaction
4 development » 2 development, 4 developing
development l » development li, development 1, development law
cost data » test data
l afrique » en afrique
data up » data us, data und, data use
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies co interaction cost data up communication costs 4 development l afrique.*.