Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
4.2 communications » 4.2 communication, 3.2 communication, 6.2 communication
technology choice » technology change
choice inflation » choice information, price inflation
developpement la » developpement de, developpement et, developpement du
inflation rates » inflation rate
la afrique » l afrique, la fabrique, en afrique
have 4.2 » have 5.3, have 9.1, have co2

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

• Adding a wildcard symbol may retrieve word variants: technology choice inflation rates have 4.2 communications costs _ developpement la afrique.*.