Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
oral communication » mobile communication, _ communication, risk communication
development case » development bank, development a, development aid
technical chief » technical brief, technical change, technical review
information act » information age, information about, information gaps

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

• Performing a fuzzy search may retrieve terms with similar spellings: technical chief information act de oral communication costs _ development case afrique.~.
• Adding a wildcard symbol may retrieve word variants: technical chief information act de oral communication costs _ development case afrique.*.