Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
development recent » development report, development results, development reports
technologies can » technologies a, technologies _, technology can
can information » care information, change information, fund information
information gap » information _, information flow
de mobile » does mobile, _ mobile, a mobile

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

• Adding a wildcard symbol may retrieve word variants: technologies can information gap de mobile communication costs _ development recent afrique.*.