Perhaps you should try some spelling variations:
2.3 communication » 3.2 communication, de communication, 4 communication
developpement il » developpement de, developpement et, developpement du
existing effect » mediating effect, testing effect
technology 2 » technology _, technology 1, technology 3
effect firm » affect firms, effect first, effect from
2 existing » _ existing, 3 existing, pre existing
il afrique » l afrique, en afrique
firm 2.3 » firm 12.3, firma 2.3, firm 2.2

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

• Adding a wildcard symbol may retrieve word variants: technology 2 existing effect firm 2.3 communication costs _ developpement il afrique.*.