Perhaps you should try some spelling variations:
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
face interaction » machine interaction, matter interaction, 3.2 interaction
interaction term » interaction _
developpement de » developpement des, developpement durable
technology face » technology facts, technology fat, technology finance
a developpement » au developpement, de developpement, le developpement
term prices » term price, term process, farm prices
prices 2.7 » prices 2.4, prices 2.1, prices 2.3
de afrique » de l'afrique, en afrique, 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 face interaction term prices 2.7 communication costs a developpement de afrique.*.