Perhaps you should try some spelling variations:
communication model » communication media
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
technology usage » technology use, technology age, technology users
ad developpement » au developpement, de developpement, le developpement
usage inflation » wage inflation, age inflation, usage information
developpement l » developpement il, developpement la, developpement de
inflation boys » inflation bias, inflation gross, inflation als
boys prices » bonds prices, bond prices, goods prices
prices 4.2 » prices 3.2, prices 4.6, prices 4.9
l afrique » en afrique
model ad » model a, model aa, model act

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

• Adding a wildcard symbol may retrieve word variants: technology usage inflation boys prices 4.2 communication model ad developpement l afrique.*.