Perhaps you should try some spelling variations:
volume ventilation » volume estimation, volume variation
technology volume » technologies volume, seismology volume, technology evolution
ventilation rates » ventilation modes, ventilation strategy, ventilation systems
3.2 communication » 3 communication, 2.3 communication, de communication
developpement la » developpement de, developpement et, developpement du
4 developpement » de developpement, le developpement, et developpement
rates case » rates cape, states case, rates east
la afrique » l afrique, la fabrique, en afrique
case 3.2 » case 4.2, case 3.1, case 5.2
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology volume ventilation rates case 3.2 communication costs 4 developpement la afrique.*.