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
technology cases » technology case, technology based, technology costs
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
cases inflation » taxes inflation, wages inflation, core inflation
inflation rates » inflation rate
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 cases inflation rates file 3.2.3.2 communication _ du developpement de afrique.*.