Perhaps you should try some spelling variations:
communication modes » communication costs, communication media, communication methods
technologies child » technologies could, technologies fish, technologies ict
oral communication » mobile communication, _ communication, risk communication
child information » chief information, card information, field information
development co » development _, development a, development case
flows debt » low 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 child information flows debt oral communication modes _ development co afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies child information flows debt oral communication modes _ development co afrique.*.