Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
change information » chandos information, trade information
techniques change » techniques chapter, techniques case, techniques challenges
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
de afrique » de l'afrique, en afrique, l afrique
dem data » dpm data, em data, them data
3.2 dem » 3.2 der, 3.2 des, 3.2 det
costs a » costs _, costs 4

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

• Performing a fuzzy search may retrieve terms with similar spellings: techniques change information 3.2 dem data communications costs a developpement de afrique.~.
• Adding a wildcard symbol may retrieve word variants: techniques change information 3.2 dem data communications costs a developpement de afrique.*.