Perhaps you should try some spelling variations:
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
technology curve » technology course, technology survey, technology courses
curve evaluation » course evaluation, care evaluation, core evaluation
developpement de » developpement des, developpement durable
evaluation aus » evaluation aims, evaluation a, evaluation age
aus case » aids case, acts case, ages case
case 3.1 » case 4.1, case 3.2, case 1

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

• Adding a wildcard symbol may retrieve word variants: technology curve evaluation aus case 3.1 communication costs _ developpement de l'afrique.*.