Perhaps you should try some spelling variations:
information ratio » information nation, information matrix, information section
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
developpement de » developpement des, developpement durable
dis information » mis information, aids information, des informations
technology dis » technology does, technology 4ir, technology dlt
ratio case » rating case, ratio cable, ratio scale
de afrique » de l'afrique, en afrique, l afrique
case 4.1 » case 4.2, case 1

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

• Adding a wildcard symbol may retrieve word variants: technology dis information ratio case 4.1 communication costs _ developpement de afrique.*.