Perhaps you should try some spelling variations:
data communication » data communications
trade development » software development
communication en » communications en, communication et, communication el
typologies 6.4 » typologies 4.4, typologies 6.3, typologies 2.3
development de » development d, development ds, developpement de
6.4 variation » 3.3 variation, 6.3.5 variation, _ variation
timss data » time data
de afrique » de l'afrique, en afrique, l afrique
en trade » open trade, when trade, non trade

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

• Adding a wildcard symbol may retrieve word variants: typologies 6.4 variation _ timss data communication en trade development de afrique.*.