Perhaps you should try some spelling variations:
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
data development » delta development, doha development, data envelopment
notation places » locations places, notation papers, notations papers
places spaces » place space
spaces 4.2 » space 4.2, spaces 4.1, spaces 6.2
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 places spaces 4.2 communication costs data development 1 afrique.*.