Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
trade development » software development
case information » care information, based information, phase information
information gaps » information gap
technology case » technology based, technology can, technology change
costly trade » costs trade, country trade, costly than
gaps des » kamps des, dans des, fais des
des risk » does risk, lens risk, nets risk

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

• Adding a wildcard symbol may retrieve word variants: technology case information gaps des risk communication costly trade development _ afrique.*.