Perhaps you should try some spelling variations:
interaction labour » interaction about, intervention labour, interaction layer
tests interaction » results interaction, cases interaction, depth interaction
technology tests » technology thesis, technology best, technology costs
4 communication » 3 communication, 5.4 communication, de communication
a developpement » au developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
labour prices » labour process, labor price, labour practices
l afrique » en afrique
prices 4 » prices _, prices a, prices 3
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 tests interaction labour prices 4 communication costs a developpement l afrique.*.