Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
population level » population center, population age, population based
developpement il » developpement de, developpement et, developpement du
technology 3 » technology _, technology 1, technology 4
3 population » 2 population, 4 population, 1 population
il afrique » l afrique, en afrique
pre 3.2 » pre 3.4.2, care 3.2, core 3.2

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

• Adding a wildcard symbol may retrieve word variants: technology 3 population level pre 3.2 communication costs _ developpement il afrique.*.