Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
based election » based selection, based detection, based reflections
election mine » election time, election winner, election pre
mine water » marine waters, saline water
du afrique » en afrique, l afrique, de l'afrique
water 3.2 » water 3.3, water 2.2, water 7.2
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology based election mine water 3.2 communication costs a developpement du afrique.*.