Perhaps you should try some spelling variations:
22neglected diseases » neglected diseases, selected diseases, selected disease
neglected disease » neglected 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.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22neglected diseases) OR (neglected disease)) %((2f prevention) OR (proof prevention)) %26 control%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22neglected diseases) OR (neglected disease)) %((2f prevention) or (proof prevention)) %26 control%22".
• Adding a wildcard symbol may retrieve word variants: %((22neglected diseases) OR (neglected disease)) %((2f prevention) or (proof prevention)) %26 control%22*.