Perhaps you should try some spelling variations:
3.3.2 communication » 3.4.2 communication, 3.2.3.2 communication, 13.3.9 communication
technology wages » technology age, technology week, technology usage
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
wages inflation » wage inflation, age inflation, cases inflation
file 3.3.2 » file 3.2.3, file 9.3.4
rate file » case file, rate fee, rate firm

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• Adding a wildcard symbol may retrieve word variants: technology wages inflation rate file 3.3.2 communication _ du developpement en afrique.*.