Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
risi communication » risk communication, crisis communication, risk communications
trade information » price information, private information, credit information
urban development » human development
technology trade » technology transfer, technology change, technology transfers
information et » information act, information _, information need
costs urban » cost urban, most urban, crisis urban

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

• Adding a wildcard symbol may retrieve word variants: technology trade information et de risi communication costs urban development _ africa.*.