Perhaps you should try some spelling variations:
2.3.1.1 communication » 2.2.5.4 communication, 3.4.1 communication, 6.2.4.1 communication
inflation gross » inflation across, inflation process, information gross
a developpement » au developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
technology gap » technology 1, technology 2.2, technology 3
primer 2.3.1.1 » krieg 2.3.1.1, primer 11.1.1, primer a2.1.1
gap inflation » has inflation, grade inflation, rapid inflation
gross primer » gross primary, cross price, gross power
l afrique » en afrique
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 gap inflation gross primer 2.3.1.1 communication costs a developpement l afrique.*.