Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.2 communications » 2.2 communication, 4.2 communications, 3.2 communication
developpement en » developpement et, developpement des, developpement de
technology gaps » technology gap
inflation wages » inflation rates, inflation taxes, inflation targets
gaps inflation » has inflation, grade inflation, rapid inflation
wages space » wages race
space 2.2 » space 2.1, space 3.2, space 3.3

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

• Adding a wildcard symbol may retrieve word variants: technology gaps inflation wages space 2.2 communications costs _ developpement en afrique.*.