Perhaps you should try some spelling variations:
line developpement » le developpement, line development, mine development
2.3 communication » 3.2 communication, de communication, 4 communication
developpement en » developpement et, developpement des, developpement de
technology than » technology tax, technology trap, technology change
than infection » tract infection, human infection, plant infection
infection data » infection rate, infection rates, section data
data space » data spaces, data sparse, data scarce
costs line » costs linked, costs land, costs longer
space 2.3 » space 2.1, space 2.2, space 3.3

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

• Adding a wildcard symbol may retrieve word variants: technology than infection data space 2.3 communication costs line developpement en afrique.*.