Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
data development » delta development, doha development, data envelopment
notation papers » notation part, notation chapter
papers spaces » papers papers, papers paper, places spaces
spaces 6.2 » spaces 4.2, spaces 1.1, spaces 2.1
costs data » cost data
1 afrique » l afrique, en afrique, 1 enrique

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

• Adding a wildcard symbol may retrieve word variants: technology _ notation papers spaces 6.2 communication costs data development 1 afrique.*.