Perhaps you should try some spelling variations:
communication cost » communication costs, communications costs, communication mode
technologies debt » technologies new, technologies ict, technologies sector
debt information » student information, credit information, health information
per development » power development, spur development, power developments
information et » information act, information _, information need
et does » der does

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

• Adding a wildcard symbol may retrieve word variants: technologies debt information et does mobile communication cost per development _ afrique.*.