Perhaps you should try some spelling variations:
technologies imperfect » technologies impact, technologies internet, technologies improve
imperfect information » market information
communication mode » communication model, communication modes, communication module
development age » development stage, development a, development aid
3 development » 2 development
de mass » de masse, de mais, de masa
mode 3 » mode _, mode 1, mode 4

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

• Adding a wildcard symbol may retrieve word variants: technologies imperfect information _ de mass communication mode 3 development age afrique.*.