Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
user interaction » computer interaction
interaction term » interaction _
technology user » technology users, technology use, technology used
development ds » development d, development does, development desd
term prices » term price, term process, farm prices
prices 3.1 » prices 2.1, prices 3.2, prices 2.3.1
ds afrique » en afrique, l afrique, de l'afrique
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: technology user interaction term prices 3.1 communications costs a development ds afrique.*.