Perhaps you should try some spelling variations:
22radiation injuries » friction injuries, rotation injuries
2f therapy » 2 therapy, tnf therapy, 2.2 therapy
rf therapy » tnf therapy, brief therapy, grief therapy
amputation » imputation, computation, reputation

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: %((((((22radiation injuries) OR (((radiation injury) OR (radiation induced))))) OR (amputation injuries))) OR (radiation injuries)) %((2f therapy) OR (rf therapy))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((((22radiation injuries) or (((radiation injury) or (radiation induced))))) or (amputation injuries))) or (radiation injuries)) %((2f therapy) OR (rf therapy))%22".
• Adding a wildcard symbol may retrieve word variants: %((((((22radiation injuries) or (((radiation injury) or (radiation induced))))) or (amputation injuries))) or (radiation injuries)) %((2f therapy) OR (rf therapy))%22*.