Perhaps you should try some spelling variations:
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
developpement du » developpement de, developpement des, developpement et
inflation goods » inflation good, inflation gross, information goods
4 developpement » de developpement, le developpement, et developpement
technology gap » technology 1, technology 2.2, technology 3
gap inflation » has inflation, grade inflation, rapid inflation
goods price » goods prices, good price, goods private
du afrique » en afrique, l afrique, de l'afrique
price 3.1 » prices 3.1, rice 3.1, price 3.2
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology gap inflation goods price 3.1 communication costs 4 developpement du afrique.*.