Perhaps you should try some spelling variations:
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"world bank technical paper. europe and central asia environmentally and socially sustainable rural development process." » "world bank technical paper. europe and central sea environmental and socially sustainable rural development process.", "world bank technical paper. europe and central aqaba environmental and socially sustainable rural development process.", "world bank technical paper. europe and central asia environmentally and socially sustainable rural development projects.", "world bank technical paper. europe and central asia environmentally and socially sustainable rural development programs.", "world bank technical paper. europe and central asia environmentally and socially sustainable rural development policies.", "world bank technical paper. europe and central asia environmentally and socially sustainable urban development process.", "world bank technical paper. europe and central asia environmentally and socially sustainable resource development process.", "world bank technical paper. europe and central asia environmentally and socially sustainable social development process.", "world bank technical experts. europe and central asia environmentally and socially sustainable rural development process.", "world bank technical report. europe and central asia environmentally and socially sustainable rural development process.", "world a technical paper. europe and central asia environmentally and socially sustainable rural development process."
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• If you are trying to use Boolean operators, they must be ALL CAPS: (("world bank technical paper. europe and central _ environmentally and socially sustainable use development strategies.") OR ((("world bank technical paper. europe and central asia environmentally and socially sustainable rural development process.") OR ("world war technical paper. europe and central asia environmentally and socially sustainable rural development services."))))~.
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• Adding a wildcard symbol may retrieve word variants: (("world bank technical paper. europe and central _ environmentally and socially sustainable use development strategies.") or ((("world bank technical paper. europe and central asia environmentally and socially sustainable rural development process.") or ("world war technical paper. europe and central asia environmentally and socially sustainable rural development services."))))*.