Perhaps you should try some spelling variations:
communication model » communication media
5.4 communication » de communication, data communication
developpement en » developpement et, developpement des, developpement de
inflation bonds » inflation boys, inflation und, inflation bias
2 developpement » de developpement, le developpement, et developpement
bonds prices » bond prices, bond price, goods prices
prices 5.4 » prices 2.4, prices 5.2, prices 4
model 2 » model 1, model 2.2, model 2.1

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation bonds prices 5.4 communication model 2 developpement en afrique.*.