Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
technologies de » technologies new, technologies _, technologies a
information gap » information _, information flow
de information » do information, debt information, does information
development en » development menu, development can, development _
costs human » lost human

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

• Adding a wildcard symbol may retrieve word variants: technologies de information gap de _ communication costs human development en afrique.*.