Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication cost » communication costs, communication costa, communications costs
technologies dans » technologies can, technologies any, technologies daf
urban development » human development
dans information » dns information, dis information, does information
information mary » information many, information mart, information summary
cost urban » most urban, worst urban, bust urban
3 optical » _ optical, 3 optimal, 3.3 optical
mary 3 » mary e, mary _, mary k

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

• Adding a wildcard symbol may retrieve word variants: technologies dans information mary 3 optical communication cost urban development _ afrique.*.