Perhaps you should try some spelling variations:
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
developpement de » developpement des, developpement durable
technology gaps » technology gap
a developpement » au developpement, de developpement, le developpement
gaps inflation » has inflation, grade inflation, rapid inflation
inflation base » inflation rate, inflation bias, inflation das
base price » sale price
price 2.2 » price 2.3, price 2.4, price 3.2
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 gaps inflation base price 2.2 communication costs a developpement de l'afrique.*.