Perhaps you should try some spelling variations:
12 communication » 1 communication, 10 communication, 13 communication
developpement de » developpement des, developpement durable
testing effect » teaching effect, herding effect, resulting effects
technology co » technology cost, technology code, technology can
effect from » effects from, expect from, effect firm
co testing » con testing, pro testing, 3 testing
de afrique » de l'afrique, en afrique, l afrique
from 12 » from 10, from 15, from 11

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

• Adding a wildcard symbol may retrieve word variants: technology co testing effect from 12 communication costs _ developpement de afrique.*.