Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
developpement il » developpement de, developpement et, developpement du
technology co » technology cost, technology code, technology can
co existing » _ existing, 2 existing, 3 existing
il afrique » l afrique, en afrique
from 3.1 » from 1.1b, from 9.14, strom 3.1
expect » expert, expected

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

• Adding a wildcard symbol may retrieve word variants: technology co existing expect from 3.1 communications costs _ developpement il afrique.*.