Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement la » developpement de, developpement et, developpement du
technology work » technology week, technology network, technology working
existing effect » mediating effect, testing effect
4 developpement » de developpement, le developpement, et developpement
work existing » pre existing, co existing, do existing
effect from » effects from, expect from, effect firm
la afrique » l afrique, la fabrique, en afrique
from 4.1 » from 3.1, from 4.5, from 1.1b
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 work existing effect from 4.1 communication costs 4 developpement la afrique.*.