Perhaps you should try some spelling variations:
interventionism schemes » interventionism shift
post interventionism » past interventions, _ interventionism, 4 interventionism
fed irrigation » led irrigation, field irrigation, et irrigation
supply post » supply cost, supply costs, supply 21st
supply fed » supply food, supply based
systems. » system.

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• Performing a fuzzy search may retrieve terms with similar spellings: (( supply fed irrigation systems. ) or ( supply post interventionism schemes. ))~.
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