Perhaps you should try some spelling variations:
12.2.4 communication » 2.2.3 communication, 5.4 communication, 2.3 communication
communication cost » communication costs, communication costa, communications costs
growth development » youth development
technology have » technology hard, technology has, technologies have
have inflation » wage inflation, age inflation, has inflation
development en » developpement en, development menu, development eco
inflation das » inflation bias, inflation tax, inflation a
bayes 12.2.4 » bayes 2.2.4, bayes 1.6.1, bayes 2.2
cost growth » post growth, boost growth, just growth
das bayes » des bayes, die bayes

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• Adding a wildcard symbol may retrieve word variants: technology have inflation das bayes 12.2.4 communication cost growth development en afrique.*.