Perhaps you should try some spelling variations:
22neglected diseases » neglected diseases, neglected disease, selected diseases
proof prevention » proof preventing, proof presentation, probes prevention
2f prevention » f prevention, 2f prediction, serif prevention
26 control » 6 control, 16 control, 12.6 control

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "%22neglected diseases %((2f prevention) OR (proof prevention)) %26 control%22".
• Adding a wildcard symbol may retrieve word variants: %22neglected diseases %((2f prevention) OR (proof prevention)) %26 control%22*.