Perhaps you should try some spelling variations:
communication efforts » communication networks, communications networks, communication network
oral communication » mobile communication, _ communication, risk communication
asian development » human development, urban development, clean development
technologies de » technologies new, technologies _, technologies a
information gap » information _, information flow
de information » do information, debt information, does information

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

• Adding a wildcard symbol may retrieve word variants: technologies de information gap de oral communication efforts asian development _ afrique.*.