Perhaps you should try some spelling variations:
technology sector » technology series, technology social
sector population » vector populations, sector regulation, center population
population factor » population factors, population sector, population facts
3.2 communication » 3 communication, 2.3 communication, de communication
developpement il » developpement de, developpement et, developpement du
a developpement » au developpement, de developpement, le developpement
factor rice » factor price, factor prices, factor site
il afrique » l afrique, en afrique
rice 3.2 » price 3.2, rice 3.1, rice 3.3
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology sector population factor rice 3.2 communication costs a developpement il afrique.*.