Perhaps you should try some spelling variations:
population center » population census, population censuses, population change
3.2 communication » 3 communication, 2.3 communication, de communication
developpement il » developpement de, developpement et, developpement du
center prices » center prcec, center parties, center protest
technology 1 » technology _
1 population » 2 population, 4 population, 2.1 population
prices 3.2 » price 3.2, prices 3.1, prices 4.2
il afrique » l afrique, en afrique

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

• Adding a wildcard symbol may retrieve word variants: technology 1 population center prices 3.2 communication costs _ developpement il afrique.*.