Perhaps you should try some spelling variations:
communication skills » communication services, communication systems
clean development » human development, urban development
technologies do » technologies de, technologies box, technologies daf
do information » 2 information, 1 information, 3 information
skills clean » skills can, spills cleanup, skills create
gap does » gap die, lcp does

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies do information gap does risk communication skills clean development _ afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies do information gap does risk communication skills clean development _ afrique.*.