Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.3 communications » 2.3 communication, 4.3 communication, 1.3 communication
developpement en » developpement et, developpement des, developpement de
technology gap » technology 1, technology 2.2, technology 3
gap inflation » has inflation, grade inflation, rapid inflation
inflation tax » inflation rate, inflation _, inflation target
space 2.3 » space 2.1, space 2.2, 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 gap inflation tax space 2.3 communications costs _ developpement en afrique.*.