Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
oral communication » mobile communication, _ communication, risk communication
technologies debt » technologies new, technologies ict, technologies sector
information needs » information flows, information networks
development urban » development bank, development band, development update
debt information » student information, credit information, health information
de development » e development, de developpement, code development
urban africa » urban area, rural africa
needs de » needs _, needs a
costs de » costs per, costs _, costs a

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

• Adding a wildcard symbol may retrieve word variants: technologies debt information needs de oral communication costs de development urban africa.*.