Perhaps you should try some spelling variations:
9.1 communication » 4.1 communication, 1.1 communication, 3.1 communication
developpement de » developpement des, developpement durable
der information » insider information, sector information, labor information
technology der » technology does, technology 4ir, technology dlt
3.2 practice » 3.2 practices, 3.1 practice, 3.3 practice
practice 9.1 » practice 4.1, practice 5.1, practice 3.1
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology der information 3.2 practice 9.1 communication costs _ developpement de afrique.*.