Perhaps you should try some spelling variations:
overview population » overall population, overview location, overview motivation
population taken » population target, population age, population based
de communication » mobile communication, online communication
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
method overview » methods overview
taken place » market place
place de » place _
costs du » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: method overview population taken place de communication costs du developpement de l'afrique.*.