Perhaps you should try some spelling variations:
data communication » data communications
trade development » software development
communication en » communications en, communication et, communication el
typologies 6.3 » typologies 2.3, typologie 1.3, typologies 2.5
development ds » development d, development does, development desd
6.3 variation » 3.3 variation, 6.4 variation, 1.3 variation
timss data » time data
ds afrique » en afrique, l afrique, de 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 6.3 variation _ timss data communication en trade development ds afrique.*.