Perhaps you should try some spelling variations:
22neglected diseases » neglected disease, selected diseases, selected disease
probes prevention » problems prevention, problem prevention, process prevention
2f prevention » f prevention, 2f prediction, proof 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 diseases)) %((2f prevention) OR (probes prevention)) %26 control%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22neglected diseases) OR (neglected diseases)) %((2f prevention) or (probes prevention)) %26 control%22".
• Adding a wildcard symbol may retrieve word variants: %((22neglected diseases) OR (neglected diseases)) %((2f prevention) or (probes prevention)) %26 control%22*.