Perhaps you should try some spelling variations:
developpement du » developpement de, developpement des, developpement et
de communication » mobile communication, online communication
a developpement » au developpement, de developpement, le developpement
technology 4 » technology _, technology 1, technology 3
du afrique » en afrique, l afrique, de l'afrique
4 section » 3 section, 4 selection, 1.4 section
low rate » flow rate, low water
low rank » low risk, low back
costs a » costs _, costs 4

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technology 4 section ((low rate) OR (low rank)) de communication costs a developpement du afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 4 section ((low rate) OR (low rank)) de communication costs a developpement du afrique.*.