Perhaps you should try some spelling variations:
communication model » communication media
de communication » mobile communication, online communication
2.1 development » 3.1 development, 2.3 development, 2.2 development
inflation boys » inflation bias, inflation gross, inflation als
development de » development d, development ds, developpement de
boys prices » bonds prices, bond prices, goods prices
prices de » prices does, prices _, prices a
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 boys prices de communication model 2.1 development de l'afrique.*.