Perhaps you should try some spelling variations:
communication model » communication media
4.3 communication » 2.3 communication, 4.1 communication, 4 communication
technology usage » technology use, technology age, technology users
usage inflation » wage inflation, age inflation, usage information
a developpement » au developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
inflation und » inflation index, inflation _, inflation tax
und prices » fund prices, land prices, bond prices
prices 4.3 » price 4.3, prices 2.3, prices 4.2
l afrique » en afrique
model a » model 1

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

• Adding a wildcard symbol may retrieve word variants: technology usage inflation und prices 4.3 communication model a developpement l afrique.*.