Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
existing effect » mediating effect, testing effect
technology do » technology does, technology dlt, technology 1
do existing » co existing, _ existing, 2 existing
effect from » effects from, expect from, effect firm
de afrique » de l'afrique, en afrique, l afrique
from de » from dem, from deep

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

• Adding a wildcard symbol may retrieve word variants: technology do existing effect from de communication costs _ developpement de afrique.*.