Perhaps you should try some spelling variations:
communication events » communication event, communicative events, communication elements
3.2 communication » 3 communication, 2.3 communication, de communication
technology trade » technology trends, technology transfer, technology transfers
et developpement » de developpement, le developpement, test development
developpement en » developpement et, developpement des, developpement de
trade section » trade sector, trade action, trade sanctions
section data » sectional data
data scarce » data source, data sparse, data sources
scarce 3.2 » source 3.2, scale 3.2
events et » events e, events pt, events end

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

• Adding a wildcard symbol may retrieve word variants: technology trade section data scarce 3.2 communication events et developpement en afrique.*.