Perhaps you should try some spelling variations:
maternal education » national education, general education, parental education
ties communication » fields communication, mass communication, c's communication
et developpement » de developpement, le developpement, test development
developpement en » developpement et, developpement des, developpement de
method maternal » methods material, metod material, methods materials
education arms » education aims, education amp, education area
arms trade » arms race
trade ties » trade taxes, trade studies, trade series
costs et » 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 maternal education arms trade ties communication costs et developpement en afrique.*.