Perhaps you should try some spelling variations:
communication computer » communication chapter, communication competence, communication component
overall population » rural population, general population
de communication » mobile communication, online communication
developpement du » developpement de, developpement des, developpement et
methods overall » methods overview
e developpement » de developpement, le developpement, et developpement
population age » population change, population aging, population data
du l'afrique » de l'afrique, de l'amerique
computer e » computer _, computer 5, computer 1
age rade » age grade, age race, age ready
rade de » grade der, trade die, garde de

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

• Adding a wildcard symbol may retrieve word variants: methods overall population age rade de communication computer e developpement du l'afrique.*.