Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology private » technology preface, technology rate, technology related
3.3 communications » 3.1 communications, 3.3 communication, 2.3 communication
information when » information what, information war, information wants
e developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
when rice » when price, when prices, wheat rice
l afrique » en afrique
rice 3.3 » rice 3.1, rice 2.1, rice 4.1
costs e » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology private information when rice 3.3 communications costs e developpement l afrique.*.