Perhaps you should try some spelling variations:
population structure » production structure
overall population » rural population, general population
communication cote » communication costs, communication costa, communication case
le developpement » de developpement, sme development
structure three » structure theme, structure through, structure theory
6 communication » 3 communication, 4 communication, de communication
des afrique » en afrique, de l'afrique
three 6 » three _, three cs
cote le » cote les, cote de, cote la
method » methods

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

• Adding a wildcard symbol may retrieve word variants: method overall population structure three 6 communication cote le developpement des afrique.*.