Perhaps you should try some spelling variations:
3.2.3.2 communication » 3.2.3 communication, 3.3.2 communication, 6.2.4.2 communication
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
technology wage » technology wages, technology age, technology usage
inflation rates » inflation rate
wage inflation » grade inflation, high inflation, core inflation
file 3.2.3.2 » filter 3.2.3.2, lte 3.2.3.2
rates file » rates figure
de afrique » de l'afrique, en afrique, l afrique

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• Adding a wildcard symbol may retrieve word variants: technology wage inflation rates file 3.2.3.2 communication _ du developpement de afrique.*.