Perhaps you should try some spelling variations:
communication models » communication modes, communication mode, communication mediums
technologies energy » technologies new, technologies any
a communication » _ communication, _ communications, mass communication
development en » development menu, development can, development _
flows debt » low debt
debt a » debt _

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies energy information flows debt a communication models _ development en afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies energy information flows debt a communication models _ development en afrique.*.