Perhaps you should try some spelling variations:
technological age » technological image, technological art, technological change
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
population des » population de, population data, population area
des trames » des traces, des traites, des traumas
trames 3.1 » frames 3.1, crimes 3.1, frames 3.4

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

• Adding a wildcard symbol may retrieve word variants: technological age population des trames 3.1 communication _ du developpement en afrique.*.