Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
developpement en » developpement et, developpement des, developpement de
technology used » technology use, technology based, technology users
used inflation » und inflation, cases inflation, musil inflation
rate spaces » state spaces, data spaces, safe spaces
spaces 2.1 » space 2.1, spaces 1.1, spaces 1

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

• Adding a wildcard symbol may retrieve word variants: technology used inflation rate spaces 2.1 communication costs _ developpement en afrique.*.