Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
oral communication » personal communication
clean development » human development, urban development
park information » pack information, ark information, paris information
information need » information needs, information needed, information speed
development case » development china
technology park » technology parks
cost clean » costs clear
need one » need more, need only
one oral » one moral, one rural, one oil

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

• Adding a wildcard symbol may retrieve word variants: technology park information need one oral communication cost clean development case afrique.*.