Perhaps you should try some spelling variations:
4.5 communication » 3.5 communication, 4.1 communication, 2.5 communication
a developpement » au developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
testing effect » teaching effect, herding effect, resulting effects
technology 3 » technology _, technology 1, technology 4
effect from » effects from, expect from, effect firm
l afrique » en afrique
from 4.5 » from 2.5, from 15, from 2.3
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 3 testing effect from 4.5 communication costs a developpement l afrique.*.