Perhaps you should try some spelling variations:
technology transfers » technology transfer
transfers effects » transfer effects, transfers affect, transient effects
developpement en » developpement et, developpement des, developpement de
3 communication » 4 communication, de communication, data communication
4 developpement » de developpement, le developpement, et developpement
effects cereal » effects thread, effects chemical
cereal price » cereal prices, coal price, real prices
price 3 » price _, price a, price 2.3
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology transfers effects cereal price 3 communication costs 4 developpement en afrique.*.