Perhaps you should try some spelling variations:
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
technology gap » technology 1, technology 2.2, technology 3
inflation good » inflation gopi, inflation gerold, inflation gross
gap inflation » has inflation, grade inflation, rapid inflation
good price » goods price, food price, goods prices
de afrique » de l'afrique, en afrique, l afrique
price 3.1 » prices 3.1, rice 3.1, 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 gap inflation good price 3.1 communication costs a developpement de afrique.*.