Perhaps you should try some spelling variations:
challenges solutions » challenges conclusions, challenges conclusion, challenges lessons
development partners » development process, development projects, development plans
communication model » communication media
main challenges » remaining challenges
solutions index » solutions intel, solutions under, solutions de
partners africa » parties africa, partnership africa, farmers africa
index 1 » index _, index a, index 3
model 2 » model 1, model 2.2, model 2.1

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

• Adding a wildcard symbol may retrieve word variants: main challenges solutions index 1 _ communication model 2 development partners africa.*.