Perhaps you should try some spelling variations:
4.1.7 communication » 4.1.7.2 communication, 4.1 communication, 6.1.3 communication
seismology volume » technology volume
volume variation » volume evaluation, volume ventilation, volume estimation
developpement l » developpement il, developpement la, developpement de
variation de » variation des, variation der, variation due
care 4.1.7 » care 4.2.3, care 1.1.1, care 1.1.2
l afrique » en afrique
de care » due care, we care, de cane

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

• Adding a wildcard symbol may retrieve word variants: seismology volume variation de care 4.1.7 communication costs _ developpement l afrique.*.