Perhaps you should try some spelling variations:
communication model » communication media
3.2 communication » 3 communication, 2.3 communication, de communication
inflation gross » inflation across, inflation process, information gross
2.1 development » 3.1 development, 2.3 development, 2.2 development
development ds » development d, development does, development desd
gross prices » cross price, goods prices, gross proceeds
prices 3.2 » price 3.2, prices 3.1, prices 4.2
ds afrique » en afrique, l afrique, de l'afrique
model 2.1 » model 2.2, model 1

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation gross prices 3.2 communication model 2.1 development ds afrique.*.