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
era information » a information, via information, 4a information
information war » information what, information wants, information when
technology era » technology eva, technology e, technology e.g
war re » war race, war reif
re 2.1 » re 2.3, care 2.1, rice 2.1

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

• Adding a wildcard symbol may retrieve word variants: technology era information war re 2.1 communication costs _ developpement en afrique.*.