Perhaps you should try some spelling variations:
volume ventilation » volume estimation, volume variation
technology volume » technologies volume, seismology volume, technology evolution
ventilation rate » ventilation strategy, ventilation system, ventilation modes
de developpement » sme development
developpement du » developpement de, developpement des, developpement et
1 communication » 10 communication, 3 communication, 4 communication
du afrique » en afrique, l afrique, de l'afrique
rate bias » gate bias, data bias, male bias
costs de » costs _, costs 4, costs a
bias 1 » bias _, bias 3

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

• Adding a wildcard symbol may retrieve word variants: technology volume ventilation rate bias 1 communication costs de developpement du afrique.*.